categoryPhilosophy of Mind

Philosophy of Mind

Introduction to Thomas Reid’s Inquiry Into the Human Mind

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Introduction

The Importance of the Subject and the Means of Prosecuting it.

The fabric of the human Mind is curious and wonderful, as well as that of the human body. The faculties of the one are with no less wisdom adapted to their several ends than the organs of the other. Nay it is reasonable to think, that as the mind is a nobler work, and of a higher order than the body, even more of the wisdom and skill of the Divine Architect hath been employed in its structure. It is therefore a subject highly worthy of inquiry on its own account, but still more worthy on account of the extensive influence which the knowledge of it hath over every other branch of science.

In the arts and sciences which have least connexion with the mind, its faculties are the engines which we must employ; and the better we understand their nature and use, their defects and disorders, the more skillfully we shall apply them, and with the greater success. But in the noblest arts, the mind is also the subject upon which we operate. The painter, the poet, the actor, the orator, the r moralist, and the statesman attempt to operate upon the mind in different ways and for different ends; and they succeed according as they touch properly the strings of the human frame. Nor can their several arts ever stand on a solid foundation, or rise to the dignity of science, until they are built on the principles of the human constitution.

Wisemen now agree, or ought to agree in this, that there is but one way to the knowledgeof Nature’s works; the way of observation and experiment. By our constitution, we have a strong propensity to trace particular facts and observations to general rules, and to apply such general rules to account for other effects, or to direct us in, the production of them. This procedure of the understanding is familiar to every human creature in the common affairs of life, and it is the only one by which any real discovery in philosophy can be made.

The man who first discovered that cold freezes water, and that heat turns it into vapour, proceeded on the same general principles, and in the same method, by which Newton discovered the law of gravitation and the properties of light. His regulœ philosophandi are maxims of common sense, and are practiced every day in common life; and he who philosophizes by other rules, either conceiving the material system or concerning the mind, mistakes his aim.

Conjectures and theories are the creatures of men, and will always be found very unlike the creatures of God. If we would know the works of God, we must consult themselves with attention and humility, without daring to add any thing of ours to what they declare. A just interpretation of nature is the only sound and orthodox philosophy: whatever we add of our own is apocryphal and of no authority.

All our curious theories of the formation of the earth, of the generation of animals, of the origin of natural and moral evil, so far as they go beyond a just induction from facts, are vanity and folly, no less than the vortices of Des Cartes, or the Archæus of Paracelsus. Perhaps the philosophy of the mind hath been no less adulterated by theories than that of the material system. The theory of ideas is indeed very ancient, and hath been very universally received; but as neither of these titles can give it authenticity, they ought not to screen it from a free and candid examination; especially in this age, when it hath produced a system of scepticism, that seems to triumph over all science, and even over the dictates of common sense.

All that we know of the body is owing to anatomical dissection and observation, and it must be by an anatomy of the mind that we can discover its powers and principles.

SECTION II.

The Impediments to our Knowledge of the Mind.

But it must be acknowledged, that this kind of anatomy is much more difficult than the other; and therefore it needs not seem strange, that mankind have made less progress in it. To attend accurately to the operations of our minds, and make them an object of thought, is no easy matter, even to the contemplative, and to the bulk of mankind is next to impossible.

An anatomist who hath happy opportunities, may have access to examine with his own eyes, and with equal accuracy, bodies of all different ages, sexes, and conditions so that what is defective, obscure, or preternatural in one may be discerned clearly, and in its most perfect state, in another. But the anatomist of the mind cannot have the same advantage. It is his own mind only that he can examine with any degree of accuracy and distinctness. This is the only subject he can look into. He may, from outward signs, collect the operations of other minds; but these signs are for the most part ambiguous, and must be interpreted by what he perceives within himself.

So that if a philosopher could delineate to us, distinctly and methodically, all the operations of the thinking principle within him, which no man was ever able to do, this would be only the anatomy of one particular subject; which would be both deficient and erroneous, if applied to human nature in general. For, a little reflection may satisfy us, that the difference of minds is greater than that of any other beings which we consider as of the same species.

Of the various powers and faculties we possess, there are some which nature seems both to have planted and reared, so as to have left nothing to human industry. Such are the powers which we have in common with the brutes, and which are necessary to the preservation of the individual or the continuance of the kind. There are other powers, of which nature hath only planted the seeds in our minds, but hath left the rearing of them to human culture. It is by the proper culture of these that we are capable of all those improvements in intellectuals, in taste, and in morals, which exalt and dignify human nature while, on the other hand, the neglect perversion of them makes it degeneracy and corruption.

The two-legged animal that eats of nature’s dainties what his taste or appetite craves, and satisfies his thirst at the crystal fountain, who propagates his kind as occasion and lust prompt, repels injuries, and takes alternate labour and repose, is, like a tree in the forest, purely of nature’s growth. But this same savage hath within him, the seeds of the logician, the man of taste and breeding, the orator, the statesman, the man of virtue, and tho saint; which seeds, though planted in his mind by nature, yet, through want of culture and exercise, must lie for ever buried, and be hardly perceivable by himself or by others.

The lowest degree of social life will bring to light some of those principles which lay hid in the savage state: and according to his training, and company, and manner of life, some of them, either by their native vigour or by the force of culture, will thrive and grow up to great perfection; others will be strangely perverted from their natural form; an dothers checked, or perhaps quite eradicated.

This makes human nature so various and multiform in the individuals that partake of it, that, in point of morals and intellectual endowments, it fills up all that gap which we conceive to be between brutes and devils below and the celestial orders above; and such a prodigious diversity of minds must make it extremely difficult to discover the common principles of the species.

The language of philosophers, with regard to the original faculties of the mind, is so adapted to the prevailing system that it cannot fit any other; like a coat that fits the man for whom it was made, and shows him to advantage, which yet will sit very awkward upon one of a different make, although perhaps as handsome and as well proportioned. It is hardly possible to make any innovation in our philosophy concerning the mind and its operations, without using new words and phrases, or giving a different meaning to those that are received; a liberty which, even when necessary, creates prejudice and misconstruction, and which must wait the sanction of time to authorize it. For, innovations in language, like those in religion and government, are always suspected and disliked by the many, till use hath made them familiar and prescription have given them a title.

If the original perceptions and motions of the mind were to make their appearance single and unmixed, as we first received them from the hand of nature, one accustomed to reflection would have less difficulty in tracing them; but before we are capable of reflection, they are so mixed, compounded, and decompounded by habits, associations, and abstractions, that it is hard to know what they were originally. The mind may in this respect be compared to an apothecary or a chemist, whose materials indeed are furnished by nature; but for the purposes of his art, he mixes, compounds, dissolves, evaporates, and sublimes them, till they put on a quite different appearance; so that it is very difficult to know what they were at first, and much more to bring them back to their original and natural form. And this work of the mind is not carried on by deliberate acts of mature reason, which we might recollect, but by means of instincts, habits, associations, and other principles, which operate before we come to the use of reason; so that it is extremely difficult for the mind to return upon its own footsteps, and trace back those operations which have employed it since it first began to think and to act.

Could we obtain a distinct and full history of all that hath passed in the mind of a child, from the beginning of life and sensation, till it grows up to the use of reason; how its infant faculties began to work, and how they brought forth and ripened all the various notions, opinions, and sentiments which we find in ourselves when we come to be capable of reflection this would be a treasure of natural history, which would probably give more light into the human faculties than all the systems of philosophers about them since the beginning of the world. But it is in vain to wish for what nature has not put within the reach of our power. Reflection, the only instrument by which we can discern the powers of the mind, comes too late to observe the progress of nature, in raising them from their infancy to perfection.

It must, therefore, require great caution and great application of mind, for a man that is grown up in all the prejudices of education, fashion, and philosophy, to unravel his notions and opinions, till he finds out the simple and original principles of his constitution, of which no account can be given but the will of our Maker. This may be truly called an analysis of the human faculties; and till this is performed, it is in vain we expect any just system of the mind; that is, an enumeration of the original powers and laws of our constitution, and an explication from them of the various phenomena of human nature.

Success, in an inquiry of this kind, it is not in human power to command; but perhaps it is possible, by caution and humility, to avoid error and delusion. The labyrinth maybe too intricate, and the thread too fine, to be traced through all its windings; but if we stop where we can trace it no further, and secure the ground we have gained, there is no harm done; a quicker eye may in time trace it further.

It is genius, and not the want of it, that adulterates philosophy, and fills it with error and false theory. A creative imagination disdains the mean offices of digging for a foundation, of removing rubbish, and carrying materials; leaving these servile employments to the drudges in science, it plans a design and raises a fabric. Invention supplies materials where they are wanting, and fancy adds colouring and every befitting ornament. The work pleases the eye, and wants nothing but solidity and*a good foundation. It seems even to vie with the works of nature; till some succeeding architect blows it into rubbish, and builds as goodly a fabric of his own in its place. Happily for the present age, the castle-builders employ themselves more in romance than in philosophy. That is undoubtedly their province, and in those regions the offspring of fancy is legitimate; but in philosophy it is all spurious.

Section III.

The present State of this Part of Philosophy. — Of Des Cartes, Malebranche, and Locke.

That our philosophy concerning the mind and its faculties is but in a very low state, may be reasonably conjectured, even by those who never have narrowly examined it. Are there any principles, with regard to the mind, settled with that perspicuity and evidence which attends the principles of mechanics, astronomy, and optics? — These are really sciences built upon laws of nature which universally obtain. What is discovered in them is no longer matter of dispute: future ages may add to it, but, till the course of nature be changed, what is already established can never be overturned. But when we turn our attention inward, and consider the phenomena of human thoughts, opinions, and perceptions, and endeavor to trace them to the general laws and the first principles of our constitution, we are immediately involved in darkness and perplexity. And if common sense, or the principles of education, happen not to be stubborn, it is odds but we end in absolute skepticism.

Des Cartes finding nothing established in this part of philosophy, in order to lay, the foundation of it deep, resolved not to believe his own existence till he should be able to give a good reason for it. He was, perhaps, the first that took up such a resolution: but if he could indeed have effected his purpose, and really become diffident of his existence, his case would have been deplorable, and without any remedy from reason or philosophy. A man that disbelieves his own existence, is surely as unfit to be reasoned with, as a man that believes he is made of glass. There may be disorders in the human frame that may produce such extravagancies; but they will never be cured by reasoning.

Des Cartes indeed would make us believe, that he got out of this delirium by this logical argument, Cogito ergo sum. But it is evident he was in his senses all the time, and never seriously doubted of his existence. For he takes it for granted in this argument, and proves nothing at all. I am thinking, says he, therefore I am: and is it not as good reasoning to say, I am sleeping, therefore I am? or, I am doing nothing, therefore I am? If a body moves, it must exist, no doubt; but if it is at rest, it must exist likewise.

Perhaps Des Cartes meant not to assume his own existence in this enthymeme, but the existence of thought; and to infer from that the Existence of a mind, or subject of thought. But why did he not prove the existence of his thought? Consciousness, it may be said, vouches that. But who is voucher for consciousness ? Can any man prove that his consciousness may not deceive him? No man can: nor can we give a better reason for trusting to it, than that every man, while his mind is sound, is determined, by the constitution of his nature, to give implicit belief to it, and to laugh at, or pity, the man who doubts its testimony. And is not every man, in his wits, as much determined to take his existence upon trust as his consciousness ?’

The other proposition assumed in this, argument, That thought cannot be without a mind or subject, is liable to the same objection: not that it wants evidence; but that its evidence is no clearer, nor more immediate, than that of the proposition to be proved by it. And taking all these propositions together, — I think, — I am conscious, — Everything that thinks, exists, — I exist, — would not every sober man form the same opinion of the man who seriously doubted any one of them? And if he was his friend, would he not hope for his cure from physic and good regimen, rather than from metaphysic and logic?

But supposing it proved, that my thought and my consciousness must have a subject, and consequently that I exist, how do I know that all that train and succession of thoughts which I remember, belong to one subject, and that the I of this moment, is the very individual I of yesterday, and of times past?

Des Cartes did not think proper to start this doubt but Locke has done it; and, in order to resolve it, gravely determines, that personal identity consists in consciousness; that is, if you are conscious that you did such thing a twelvemonth ago, this consciousness makes you to^e the very person that did it. Now, consciousness of what is past can signify nothing else but the remembrance that I did it. So that Locke’s principle must be, That identity consists in remembrance; and consequently a man must lose his personal identity with regard to everything he forgets.

Nor are these the only instances whereby our philosophy concerning the mind appears to be very fruitful in creating doubts, but very unhappy in resolving them.

Des Cartes, Malebranche, and Locke, have all employed their genius and skill, to prove the existence of a material world; and with very bad success. Poor untaught mortals believe undoubtedly, that there is a sun, moon, and stars; an earth, which we inhabit; country, friends, and relations, which we enjoy; land, houses, and moveables, which we possess. But philosophers, pitying the credulity of the vulgar, resolve to have no faith but what is founded upon reason. They apply to philosophy to furnish them with reasons for the belief of those things, which all mankind have believed without being able to give any reason for it. And surely one would expect, that, in matters of such importance, the proof would not be difficult: but it is the most difficult thing in the world. For these three great men, with the best good will, have not been able, from all the treasures of philosophy, to draw one argument, that is fit to convince a man that can reason, of the existence of any one thing without him. Admired Philosophy! daughter of light! parent of wisdom and knowledge! if thou art she! surely thou hast not yet arisen upon the human mind nor blessed us with more of thy rays, than are sufficient to shed a “darkness visible” upon the human faculties, and to disturb that repose and security which happier mortals enjoy, who never approached thine altar, nor felt thine influence! But if indeed thou hast not power to dispel those clouds and phantoms which thou hast discovered or created, withdraw this penurious, and malignant ray; I despite Philosophy, and renounce its guidance; let my soul dwell with Common Sense.

Section IV

Apology for those philosophers

But instead of despising the dawn of light, we ought rather to hope for its increase: instead of blaming the philosophers I have mentioned, for the defects and blemishes of their system, wf ought rather to honor their memories, as the first discoverers of a region in philosophy formerly unknown; and, however lame and imperfect the system may be, they have opened the way to future discoveries, and are justly entitled to a great share in the merit of them. They have removed an infinite deal of rust and rubbish, collected in the ages of scholastic sophistry, which had obstructed the way. They have put us in the right road, that of experience and accurate reflection. They have taught us to avoid the snares of ambiguous and ill-defined words, and have spoken and thought upon this subject with a distinctness and perspicuity formerly unknown. They have made many opening that may lead to the discovery of truths which they did not reach, or to the detection of errors in which they were involuntarily entangled.

It may be observed, that the defects and blemishes in the received philosophy concerning the mind, which have most exposed it to the contempt and ridicule of sensible men, have chiefly been owing to this; — that the votaries of this philosophy, from a natural prejudice in her favour, have endeavoured to extend her jurisdiction beyond its just limits, and to call to her bar the dictates of Common Sense. But these decline this jurisdiction; they disdain the trial of reasoning, and disown its authority; they neither claim its aid, nor dread its attacks.

In this unequal contest betwixt Common Sense and Philosophy, the latter will always come off both with dishonor and loss; nor can she ever thrive till this rivalry is dropped, these encroachments given up, and a cordial friendship restored: for, in reality, Common Sense holds nothing of Philosophy, nor needs her aid. But, on the other hand, Philosophy (if I may be permitted to change the metaphor) has no other root but the principles of Common Sense; it grows out of them, and draws its nourishment from them; severed from this root, its honors wither, its sap is dried up, it dies and rots.

The philosophers of the last age, whom I have mentioned, did not attend to the preserving this union and subordination so carefully as the honor and interest of philosophy required: but those of the present have wage open war with Common Sense, and hope to make a complete conquest of it by the subtleties of Philosophy; an attempt no less audacious and vain, than that of the giants to dethrone almighty Jove.

Section V

Of Bishop Berkeley; the Treatise of Human Nature; and of skepticism

The present age, I apprehend, has not produced two more acute or more practiced in this part of philosophy, than the Bishop of Cloyne, and the author of the Treatise of Human Nature. The first was no friend to skepticism, but had that warm concern for religious and moral principles which became his order; yet the result of his inquiry was, a serious conviction, that there is no such thing as a material world; nothing in nature but spirits and ideas; and that the belief of material substances, and of abstract ideas, are the chief causes of all our errors in philosophy, and of all infidelity and heresy in religion. His arguments are founded upon the principles which were formerly laid down by Des Cartes, Malebranche, and Locke, and which have been very generally received.

And the opinion of the ablest judges seems to be, that they neither have been, nor can be confuted; and that he hath proved, by unanswerable arguments, what no man in his senses can believe.

The second proceeds upon the same principles, but carries them to their full length and as the Bishop undid the whole material world, this author, upon the same grounds, undoes the world of spirits and leaves nothing in nature but ideas and impressions, without any subject on which they may be impressed.

It seems to be a peculiar strain of humor in this author, to set out in his introduction, ‘by promising, with a grave face, no less than a complete system of the sciences, upon a foundation entirely new, to wit, that of human nature; when the intention of the whole work is to shew, that there is neither human nature nor science in the world. It may perhaps be unreasonable to complain of this conduct in an author? who neither believes his own existence, nor that of his reader; and therefore could not mean to disappoint him, or to laugh at his credulity. Yet I cannot imagine, that the author of the Treatise of Human Nature is so skeptical as to plead this apology. He believed, against his principles, that he should be read, and that he should retain his personal identity, till he reaped the honor and reputation justly due to his metaphysical acumen. Indeed, he ingeniously acknowledges, that it was only in solitude and retirement, that he could yield any assent to his own philosophy; society, like daylight, dispelled the darkness and fogs of skepticism, and made him yield to the dominion of Common Sense. Nor did I ever hear him charged with doing any thing, even in solitude, that argued such a degree of skepticism as his principles maintain. Surely if his friends apprehended this, they would have the charity never to leave him alone.

Pyrrho the Elean, the father of this philosophy, seems to have carried it to greater perfection than any of his successors: for if we may believe Antigonus the Carystian, quoted by Diogenes Laertius, his life corresponded to his doctrine. And therefore, if a caijt run against him, or a dog attacked him, or if he came upon a precipice, he would not stir a foot to avoid the danger, giving no credit to his senses. But his attendants, who, happily for him, were not so great skeptics, took care to keep him out of harm’s way; so that he lived till he was ninety years of age. Nor is it to be doubted, but this author’s friends would have been equally careful to keep him from harm,’if ever his principles had taken too strong a hold of him.

It is probable the Treatise of Human Nature was not written in company; yet it contains manifest indications, that the author every now and then relapsed into the faith of the vulgar, and could hardly, for half a dozen pages, keep up the skeptical character. In like manner, the great Pyrrho himself forgot his principles on some occasions; and is said once to have been in such a passion with his cook, who probably had not roasted his dinner to his mind, that with the spit in his hand, and the meat upon it, he pursued him even into the marketplace.

It is a bold philosophy that rejects, without ceremony, principles which irresistibly govern the belief and the conduct of all mankind in the common concerns of life; and to which the philosopher himself must yield, after he imagines he hath confuted them.

It is a bold philosophy that rejects, without ceremony, principles which irresistibly govern the belief and the conduct of all mankind in the common concerns of life; and to which the philosopher himself must yield, after he imagines he hath confuted them. Such principles are older, and of more authority, than Philosophy: she rests upon them as her basis, not they upon her. If she could overturn them, she must be buried in their ruins; but all the engines of philosophical subtlety are too weak for this purpose ; and the attempt is no less ridiculous, than if a mechanic should contrive an axis in peritrochio to remove the earth out of its place; or if a mathematician should pretend to demonstrate, that things equal to the same thing are not equal to one another.

Zeno endeavored to demonstrate the impossibility of motion; Hobbes, that there was no difference between right and wrong; and this author, that no credit is to be given to our senses, to our memory, or even to demonstration. Such philosophy is justly ridiculous, even to those who cannot detect the fallacy of it. It can have no other tendency, than to shew the acuteness of the sophist, at the expense of disgracing reason and human nature, and making mankind Yahoos.

Section VI

Of the Treatise of Human Nature

There are other prejudices against this system of human nature, which, even upon a general view, may make one diffident of it. Des Cartes, Hobbes, and this author, have each of them given us a system of human nature; an undertaking too vast for any one man, how great soever his genius and abilities may be. There must surely be reason to apprehend, that many parts of human nature never came under their observation; and that others have been stretched and distorted, to fill up blanks, and complete the system. Christopher Columbus, or Sebastian Cabot, might almost as reasonably have undertaken to give us a complete map of America.

How unlike is it to that which it represents! What a poor piece of work compared with the body of a man, whose structure the more we know, the more wonders we discover in it, and the more sensible we are of our ignorance!

There is a certain character and style in Nature’s works, which is never attained in the most perfect imitation of them. This seems to be wanting in the systems of human nature I have mentioned, and particularly in the last. One may see a puppet make variety of motions and gesticulations, which strike much at first view; but when it is accurately observed, and taken to pieces, our admiration ceases; we comprehend the whole art of the maker. How unlike is it to that which it represents! What a poor piece of work compared with the body of a man, whose structure the more we know, the more wonders we discover in it, and the more sensible we are of our ignorance! Is the mechanism of the mind so easily comprehended, when that if the body is so difficult ? Yet, by this system, three laws of association, joined to a few original feelings, explain the whole mechanism of sense, imagination, memory, belief, and of all the actions and passions of the mind. Is this the man that Nature made? I suspect it is not so easy to look behind the scenes in Nature’s work. This is a puppet surely, contrived by too bold an apprentice of Nature, to mimic her Work. It shews tolerably by candle-light, but brought into clear day, and taken, to pieces, it will appear to be a man made with mortar and a trowel. The more we know of other parts of nature, the more we like and approve them. The little I know of the planetary system; of the earth which we inhabit; of minerals, vegetables, and animals; of my own body, and of the laws which obtain in these parts of nature; opens to my mind grand and beautiful scenes; and contributes equally to my happiness and power. But when I look within, and consider the Mind itself, which makes me capable of all these- prospects and enjoyments; if it is indeed what the Treatise of Human Nature makes it, I find I have been only in an enchanted castle, imposed upon by spectres and apparitions. I blush inwardly to think how I have been deluded; I am ashamed of my frame, and can hardly forbear expostulating with my destiny: Is this thy pastime, O Nature, to put such tricks upon a silly creature, and then to take off the mask, and shew him how he hath been befooled? If this is the philosophy of human nature, my soul enter thou not into her secrets. It is surely the forbidden tree of knowledge; I no sooner taste of it, than I perceive myself naked, and stripped of all things, yea even of my very self. I see myself, and the whole frame of nature, shrink into fleeting ideas, which, like Epicurus’s atoms, dance about in emptiness.

Section VII

The system of these authors is the same, and leads to skepticism

But what if these profound disquisitions into the first principles of human nature, do naturally and necessarily plunge a man into this abyss of skepticism? May we not reasonably judge so from what hath happened? Des Cartes no sooner began to dig in this mine, than skepticism was ready to break in upon him. He did what he could to shut it out. Malebranche and Locke, who dug deeper, found the difficulty of keeping out this enemy still to increase; but they laboured honestly in the design. Then Berkeley, who carried on the work, despairing of securing all, bethought himself of an expedient; By giving up the material World, which he thought might be spared without loss, and even with advantage, he hoped, by an impregnable partition, to secure the world of spirits. But, alas! the Treatise of Human Nature wantonly sapped the foundation of this partition, and drowned all in one universal deluge.

These facts, which are undeniable, do indeed give reason to apprehend, that Des Cartes’s system of the human understanding, which I shall beg leave to call the ideal system, and which, with some improvements made by later writers, is now generally received, hath some original defect; that this skepticism is inlaid in it, and reared along with it; and, therefore, that we must lay it open to the foundation, and examine the materials, before we can expect to raise any solid and useful fabric of knowledge on this subject.

Section VIII

We ought not to despair of a better

But is this to be despaired of, because Des Cartes and his followers have failed? By no means. This pusillanimity would be injurious to ourselves, and injurious to truth. Useful discoveries are sometimes indeed the effect of superior genius, but more frequently they are the birth of time and of accidents. A traveller of good judgment may mistake his way, and be unawares led into a wrong track; and while the road is fair before him, he may go on without suspicion and be followed by others; but when it ends in a coal-pit, it requires no great judgment to know that he hath gone wrong, nor perhaps to find out what misled him.

I am resolved to take my own existence, and the existence of other things, upon trust; and to believe that snow is cold, and honey sweet, whatever they may say to the contrary. He must either be a fool, or want to make a fool of me, that would reason me out of my reason and senses.

In the mean time, the unprosperous state of this part of philosophy hath produced an effect, somewhat discouraging indeed to any attempt of this nature, but an effect which might be expected, and which time only and better success can remedy. Sensible men, who never will be skeptics in matters of common life, are apt to treat with sovereign contempt tempt every thing that hath been said, or is to be said, upon this subject. — It is metaphysic, say they: Who minds it ? Let scholastic sophists entangle themselves in their own cobwebs; I am resolved to take my own existence, and the existence of other things, upon trust; and to believe that snow is cold, and honey sweet, whatever they may say to the contrary. He must either be a fool, or want to make a fool of me, that would reason me out of my reason and senses.

I confess I know not what a sceptic am answer to this, nor by what good argument he can plead even for a hearing; for either his reasoning is sophistry, and so deserves contempt; or there is no truth in the human faculties, and then why should we reason?

If therefore a man find himself entangled in these metaphysical toils, and can find no other way to escape, let him bravely cut the knot which he cannot loose, curse metaphysic, and dissuade every man from meddling with it. For if I have been led into bogs and quagmires, by following an ignis futuus, what can I do better, than to warn others to beware of it? If Philosophy contradicts herself, befools her votaries, and deprives them of every object worthy to be pursued or enjoyed, let let her be sent back to the infernal regions from which she must have had her original.

But is it absolutely certain that this fair lady is of the party? Is it not possible she may have been misrepresented ? Have not men of genius in former ages often made their own dreams to pass for her oracles? Ought she then to be condemned without any further hearing ? This would be unreasonable. I have found her in all other matters an agreeable companion, a faithful counsellor, a friend to Common Sense, and to the happiness of mankind. This justly entitles her to my correspondence and confidence, till I find infallible proofs of her infidelity.

Thomas Reid on Skepticism and Reasoning Oneself Out of Reason

Go He must either be a fool, or want to make a fool of me, that would reason me out of my reason and senses. ... If philosophy contradicts herself, befools her votaries, and deprives them of every object worthy to be pursued or enjoyed, let her be sent back to the infernal regions from which she must have had her original.

Defining “Artificial Intelligence” (AI)

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At a popular level, “AI” is the marketing label du jour for virtually every innovation in software, hardware, and technology that is up for sale or open to investment. Though the term is in ubiquitous use with vague semantic content, surely a more technical definition is on hand. Consider the literal definition of artificial: something made or produced by humans rather than occurring naturally. Everything about generative artificial intelligence is human in origin. Intelligence can also be difficult to define adequately. One fundamental definition is the ability to differentiate between this and that. Surely we can clarify this ubiquitous term.

Sam Harris and Garry Kasparov on AI and Respect for the Deep Blue team

Go The reason I wrote the book is not to settle old scores or give my version of the match, but to say that we should not be paralyzed by a dystopian vision of the future – worrying about killer AI and super-intelligent robots, which is like worrying about overcrowding on Mars.

Steve Jobs on Faith and What Computers Are

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Computers are actually pretty simple. We’re sitting here on a bench in this café. Let’s assume that you understood only the most rudimentary of directions and you asked how to find the rest room. I would have to describe it to you in very specific and precise instructions. I might say, “Scoot sideways two meters off the bench. Stand erect. Lift left foot. Bend left knee until it is horizontal. Extend left foot and shift weight 300 centimeters forward…” and on and on. If you could interpret all those instructions 100 times faster than any other person in this café, you would appear to be a magician: You could run over and grab a milk shake and bring it back and set it on the table and snap your fingers, and I’d think you made the milk shake appear, because it was so fast relative to my perception. That’s exactly what a computer does. It takes these very, very simple-minded instructions — “Go fetch a number, add it to this number, put the result there, perceive if it’s greater than this other number” — but executes them at a rate of, let’s say, 1,000,000 per second. At 1,000,000 per second, the results appear to be magic.

Free: Why Science Hasn’t Disproved Free Will

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There are neuroscientists who claim that our decisions are made unconsciously and are therefore outside of our control and social psychologists who argue that myriad imperceptible factors influence even our minor decisions to the extent that there is no room for free will. According to philosopher Alfred R. Mele, what they point to as hard and fast evidence that free will cannot exist actually leaves much room for doubt. If we look more closely at the major experiments that free will deniers cite, we can see large gaps where the light of possibility shines through. Mele lays out his opponents’ experiments simply and clearly, and proceeds to debunk their supposed findings, one by one, explaining how the experiments don’t provide the solid evidence for which they have been touted. There is powerful evidence that conscious decisions play an important role in our lives, and knowledge about situational influences can allow people to respond to those influences rationally rather than with blind obedience.

The Unity of Consciousness

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In The Unity of Consciousness Tim Bayne draws on philosophy, psychology, and neuroscience in defence of the claim that consciousness is unified. In the first part of the book Bayne develops an account of what it means to say that consciousness is unified. Part II applies this account to a variety of cases – drawn from both normal and pathological forms of experience – in which the unity of consciousness is said to break down. Bayne argues that the unity of consciousness remains intact in each of these cases. Part III explores the implications of the unity of consciousness for theories of consciousness, for the sense of embodiment, and for accounts of the self. In one of the most comprehensive examinations of the topic available, The Unity of Consciousness draws on a wide range of findings within philosophy and the sciences of the mind to construct an account of the unity of consciousness that is both conceptually sophisticated and scientifically informed.

Tamás Ungar on Vital Signs and the Subjectivity of Pain

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Others are missing the point, just as administrators sorely missed the point back in the 1980s when pain became the “fifth vital sign.” In medicine, vital signs are treated quite differently from symptoms. Since pain has no objective measure like the rest of the vital signs do — like temperature, heart rate, and blood pressure — doctors naturally resisted. They faced litigation and bureaucratic intimidation for undertreating pain.

Michael Egnor on What Your Computer Doesn’t Know

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Your computer doesn’t know a binary string from a ham sandwich. Your math book doesn’t know algebra. Your Rolodex doesn’t know your cousin’s address. Your watch doesn’t know what time it is. Your car doesn’t know where you’re driving. Your television doesn’t know who won the football game last night. Your cell phone doesn’t know what you said to your girlfriend this morning. ¶ People know things. Devices like computers and books and Rolodexes and watches and cars and televisions and cell phones don’t know anything. They don’t have minds. They are artifacts — paper and plastic and silicon things designed and manufactured by people — and they provide people with the means to leverage their human knowledge. ¶ Computers (and books and watches and the like) are the means by which people leverage and express knowledge. Computers store and process representations of knowledge. But computers have no knowledge themselves.

Malcolm Jeeves on the Unsettled Verdict on Mind and Brain

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On the relation between mind and brain we should note the varied views of Nobel Prize winners. The easy approach would be to say that all mental activity will ultimately be reduced down to brain activity. Some like Francis Crick, arguably the greatest biologist of the twentieth century, seemed to take that view. However, at times, even he backed off a bit, realizing that it meant that his own brilliant discoveries would become nothing more than the chattering of neurons. Other Nobel laureates who have studied brain processes have taken different views. Sir John Eccles had no doubt that the primary reality is consciousness and everything else derives from that. A more recent laureate, Gerald Edelman, argued that consciousness is “efficacious,” and is not an epiphenomenon. Yet another laureate, Roger Sperry argued very strongly for a model that he thought best fits the evidence, and that was to put full weight on the topdown effect as well as on the traditional upward microdeterminism, which is happening at the level of neurons and of the atoms and molecules of which the neurons are composed. Sir Roger Penrose, an Oxford mathematician, had no doubt that consciousness is a phenomenon through which the universe’s very existence is made known. In a word, it is stupid to pretend that consciousness and mental life are unimportant.

The Soul

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In a culture in which science is believed to hold the answers to every question, spiritual realities like the soul are often ignored or ridiculed.  We are told that neuroscience holds the key to explaining every aspect of human behavior.  Yet Christian philosopher J. P. Moreland argues that Scripture, sound philosophical reasoning, and everyday experience all point to the reality of an immaterial soul.  Countering the arguments of both naturalists and Christian scholars who embrace a material-only view of humanity, Moreland demonstrates why it is both biblical and reasonable to believe humans are essentially spiritual beings.  He also describes the various components of the soul and how Christians can nurture their souls as disciples of Christ.  Moreland shows that neuroscience and the soul are not competing explanations of human activity, but that both coexist and influence one another.  ~ Publisher’s Description

Dave Gelernter on Immodest Science

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The huge cultural authority science has acquired over the past century imposes large duties on every scientist. Scientists have acquired the power to impress and intimidate every time they open their mouths, and it is their responsibility to keep this power in mind no matter what they say or do. Too many have forgotten their obligation to approach with due respect the scholarly, artistic, religious, humanistic work that has always been mankind’s main spiritual support. Scientists are (on average) no more likely to understand this work than the man in the street is to understand quantum physics. But science used to know enough to approach cautiously and admire from outside, and to build its own work on a deep belief in human dignity. No longer.

Brainwashed

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In Brainwashed, psychiatrist and AEI scholar Sally Satel and psychologist Scott O. Lilienfeld reveal how many of the real-world applications of human neuroscience gloss over its limitations and intricacies, at times obscuring — rather than clarifying — the myriad factors that shape our behavior and identities. Brain scans, Satel and Lilienfeld show, are useful but often ambiguous representations of a highly complex system. Each region of the brain participates in a host of experiences and interacts with other regions, so seeing one area light up on an fMRI in response to a stimulus doesn’t automatically indicate a particular sensation or capture the higher cognitive functions that come from those interactions. The narrow focus on the brain’s physical processes also assumes that our subjective experiences can be explained away by biology alone. As Satel and Lilienfeld explain, this “neurocentric” view of the mind risks undermining our most deeply held ideas about selfhood, free will, and personal responsibility, putting us at risk of making harmful mistakes, whether in the courtroom, interrogation room, or addiction treatment clinic. ~ Product Description

John Searle on How We Fit In a Universe of Particles

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There is exactly one overriding question in contemporary philosophy… How do we fit in? … We now have a reasonably well-established conception of the basic structure of the universe. We have plausible theories about the origin of the universe in the Big Bang, and we understand quite a number of things about the structure of the universe in atomic physics and chemistry. We have even come to understand the nature of the chemical bond. We know a fair amount about our own development on this little Earth during the past five billion years of evolution. We understand that the universe consists entirely of particles (or whatever entities the ultimately true physics arrives at), and these exist in fields of force and are typically organized into systems. On our Earth, carbon-based systems made of molecules that also contain a lot of hydrogen, nitrogen and oxygen have provided the substrate of human, animal and plant evolution. … The most important set of basic facts, for our present purposes, are given in the atomic theory of matter and the evolutionary theory of biology. … It is not at all easy to reconcile the basic facts with … a conception of ourselves as conscious, intentionalistic, rational, social, institutional, political, speech-act performing, ethical and free will possessing agents. Now, the question is, How can we square this self-conception of ourselves as mindful, meaning-creating, free, rational, etc., agents with a universe that consists entirely of mindless, meaningless, unfree, non rational, brute physical particles?

Mind, Brain, and Free Will

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Mind, Brain, and Free Will presents a powerful new case for substance dualism (the idea that humans consist of two parts — body and soul) and for libertarian free will (that humans have some freedom to choose between alternatives, independently of the causes which influence them). Richard Swinburne argues that answers to questions about mind, body, and free will depend crucially on the answers to more general philosophical questions. He begins by analyzing the criteria for one event being the same as another, one substance being the same as another, and a state of affairs being metaphysically possible; and then goes on to analyze the criteria for a belief about these issues being justified. Pure mental events (including conscious events) are distinct from physical events and interact with them. Swinburne claims that no result from neuroscience or any other science could show that interaction does not take place; and illustrates this claim by showing that recent scientific work (such as Libet’s experiments) has no tendency whatever to show that our intentions do not cause brain events. He goes on to argue for agent causation, and claims that — to speak precisely — it is we, and not our intentions, that cause our brain events. It is metaphysically possible that each of us could acquire a new brain or continue to exist without a brain; and so we are essentially souls. Brain events and conscious events are so different from each other that it would not be possible to establish a scientific theory which would predict what each of us would do in situations of moral conflict. Hence given a crucial epistemological principle (the Principle of Credulity) we should believe that things are as they seem to be: that we make choices independently of the causes which influence us. According to Swinburne’s lucid and ambitious account, it follows that we are morally responsible for our actions.

Mind and Cosmos

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The modern materialist approach to life has conspicuously failed to explain such central mind-related features of our world as consciousness, intentionality, meaning, and value. This failure to account for something so integral to nature as mind, argues philosopher Thomas Nagel, is a major problem, threatening to unravel the entire naturalistic world picture, extending to biology, evolutionary theory, and cosmology. Since minds are features of biological systems that have developed through evolution, the standard materialist version of evolutionary biology is fundamentally incomplete. And the cosmological history that led to the origin of life and the coming into existence of the conditions for evolution cannot be a merely materialist history, either. An adequate conception of nature would have to explain the appearance in the universe of materially irreducible conscious minds, as such. Nagel’s skepticism is not based on religious belief or on a belief in any definite alternative. In Mind and Cosmos, he does suggest that if the materialist account is wrong, then principles of a different kind may also be at work in the history of nature, principles of the growth of order that are in their logical form teleological rather than mechanistic. In spite of the great achievements of the physical sciences, reductive materialism is a world view ripe for displacement. Nagel shows that to recognize its limits is the first step in looking for alternatives, or at least in being open to their possibility. ~ Publisher’s Description

After Physicalism

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Although physicalism has been the dominant position in recent work in the philosophy of mind, this dominance has not prevented a small but growing number of philosophers from arguing that physicalism is untenable for several reasons: both ontologically and epistemologically it cannot reduce mentality to the realm of the physical, and its attempts to reduce subjectivity to objectivity have thoroughly failed. The contributors to After Physicalism provide powerful alternatives to the physicalist account of the human mind from a dualistic point of view and argue that the reductive and naturalistic paradigm in philosophy has lost its force. The essays in this collection all firmly engage in a priori metaphysics. Those by Uwe Meixner, E. J. Lowe, John Foster, Alvin Plantinga, and Richard Swinburne are concerned with ways to establish the truth of dualism. Essays by William Hasker, A. D. Smith, and Howard Robinson deal with the relation between physicalism and dualism. Benedikt Paul Göcke argues that the “I” is not a particular and Stephen Priest that “I have to understand myself not as a thing but as no-thing-ness.” In the final essay, Thomas Schärtl argues that there are limits to dualism as indicated by the concept of resurrection. By including two classical essays by Plantinga and Swinburne, the volume conveniently brings together some of the best and the newest thinking in making the philosophical case for dualism.

A Brief History of the Soul

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The concept of the soul is accepted in many religious traditions and widely used in fictional worlds, and yet the idea that we are anything more than physio-chemical organisms seems out of step with contemporary secular thinking. Scratch the surface of western philosophy, however, and you find a history filled with arguments in favor of the idea that we are embodied souls. This book provides a clear and concise history of the soul, from Plato to cutting-edge contemporary work in philosophy of mind. Taking in the arguments of influential thinkers, such as Aristotle, Aquinas, Descartes, and Hume, Goetz and Taliaferro tackle keys issues, such as the problem of mind-body interaction, the causal closure of the physical world, and the philosophical implications of the brain sciences for the soul’s existence. A Brief History of the Soul brings together historical and contemporary scholarship to examine one of the essential questions of our existence.

The Soul Hypothesis

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Experts from different fields argue that there are good reasons to believe in the existence of the soul as distinct from the physical body. What do we mean when we speak about the soul? What are the arguments for the existence of the soul as distinct from the physical body? Do animals have souls? What is the difference between the mind and the soul? The Soul Hypothesis brings together experts from philosophy, linguistics and science to discuss the validity of these questions in the modern world. They contend that there is an aspect of the nature of human beings that is not reducible to the matter that makes up our bodies. This perspective is part of a family of views traditionally classified in philosophy as substance dualism, and has something serious in common with the ubiquitous human belief in the soul. The Soul Hypothesis presents views from a range of sciences and the resulting big picture shows, more clearly than one author could with one area of expertise, that there is room for a soul hypothesis.

The Waning of Materialism

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Twenty-three philosophers examine the doctrine of materialism and find it wanting. Their case against materialism comprises arguments from conscious experience, from the unity and identity of the person, from intentionality, mental causation, and knowledge. The contributors include leaders in the fields of philosophy of mind, metaphysics, ontology, and epistemology, who respond ably to the most recent versions and defenses of materialism. The modal arguments of Kripke and Chalmers, Jackson’s knowledge argument, Kim’s exclusion problem, and Burge’s anti-individualism all play a part in the building of a powerful cumulative case against the materialist research program. Several papers address the implications of contemporary brain and cognitive research (the psychophysics of color perception, blindsight, and the effects of commissurotomies), adding a posteriori arguments to the classical a priori critique of reductionism. All of the current versions of materialism — reductive and non-reductive, functionalist, eliminativist, and new wave materialism — come under sustained and trenchant attack. In addition, a wide variety of alternatives to the materialist conception of the person receive new and illuminating attention, including anti-materialist versions of naturalism, property dualism, Aristotelian and Thomistic hylomorphism, and non-Cartesian accounts of substance dualism. ~ Synopsis

Why Us?

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In ‘Why Us?’, James Le Fanu explores the major implications of the most recent findings of genetics and neuroscience, challenging the common assumption that they must ultimately explain all there is to know about life and man’s place in the world. On the contrary, he argues, they point to an unbridgeable explanatory gap between the genes strung out along the Double Helix and the near infinite beauty and diversity of the living world to which they give rise, and between the monotonous electro-chemistry of the brain and richness and creativity of the human mind. “There is,” he writes, “a powerful impression that science has been looking in the wrong place, seeking to resolve questions that somehow lie outside its domain. It is as if we – and indeed all living things – are in some way different, profounder and more complex than the physical world to which we belong.” A N Wilson in his review described it as ‘an extraordinary work of science … quite wonderfully refreshing’; for Christopher Booker in The Spectator it was “enthralling”: “one of the glories of Le Fanu’s erudite and beautifully written book is that a sense of wonder is evident on every page, even as he lucidly analyses the limitations of the narrow intellectual prism in which science has languished too long.” ~ Publisher’s Description

Cognition, Brain, and Consciousness

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Written by two leading experts in the field, this fully updated textbook takes a unique approach to introducing concepts of cognitive neurosciences. Many educational fields now require a basic understanding of cognitive neuroscience but other textbooks on the market are written for biology audiences, rather than for psychology and related majors. This text takes a thematic approach that is clear and understandable to those with or without a background in biology or neuroscience. New to this edition are Frontiers in Cognitive Neuroscience text boxes; each one focuses on a leading researcher and their topic of expertise. There is a new chapter on Genes and Molecules of Cognition, and all other chapters have been thoroughly revised, based on the most recent discoveries. New material has been added on the latest advances in brain imaging. ~ Product Description

The Captain of My Soul

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Central to the plot of Clint Eastwood’s Invictus is William Ernest Henley’s short poem of the same name. Though the role of the poem suffers some historical revisionism in the film, its role in the life of Nelson Mandela sheds light on what it truly means to be free. The film recounts the remarkable story of Mandela’s efforts at national reconciliation through his embrace of the South African rugby team, which at the time remained a symbol of Apartheid’s ethnic segregation. In 1996, when I returned for the first time to South Africa, my childhood home, some old friends shared with me how meaningful it was when Mandela appeared at Ellis Park donning the Springbok green and gold. I’m gratified that this remarkable story of reconciliation has made it to the screen, especially while Morgan Freeman is still with us. He was born to play Mandela. During Mandela’s long internment on Robben Island, Henley’s poem adorned a wall of his cell, a constant reminder that though his freedom had been taken from him, he remained “the captain of his soul“. The words of this poem, and their significance to Mandela, underscore a central point of contention in the debate about human free will. It seems to me that one problem with some arguments for compatibilism, the idea that determinism and human responsibility are compatible, is the conflating of freedom and free will. Mandela’s story is a powerful reminder that there is freedom beyond freedom. That is, it matters whether we are captains or merely observers of our souls.

Calling upon Henley’s poem as a powerful expression of our sense of having free will, here I consider one particular line of argument: that to be free in the sense relevant to moral responsibility is just to be free from external constraint. This view, classical compatibilism, continues to assert itself in spite of so obviously missing the target.1

Laurence Bonjour on Materialism as a Bandwagon

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Why have materialist views been so dominant? Part of the answer is that it is far from clear that dualist views, at least those that go much beyond the bare denial of materialism, are in any better shape. But it must be insisted that the inadequacies of dualism do not in themselves constitute a strong case for materialism: arguments by elimination are always dubious in philosophy, and never more so than here, where the central phenomenon in question (that is, consciousness) is arguably something of which we still have little if any real understanding. Instead, materialism seems to be one of those unfortunate intellectual bandwagons to which philosophy, along with many other disciplines, is so susceptible — on a par with logical behaviorism, phenomenalism, the insistence that all philosophical issues pertain to language, and so many other views that were once widely held and now seem merely foolish. Such a comparison is misleading in one important respect, however: it understates the fervency with which materialist views are often held. In this respect, materialism often more closely resembles a religious conviction — and indeed, as I will suggest further in a couple of places below, defenses of materialism and especially replies to objections often have a distinctively scholastic or theological flavor.

Laurence Bonjour on Presumptive Naturalism

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A second sort of defense in favor of materialism appeals to the general idea of naturalism. Here again we have a view, like materialism itself, to which many, many philosophers pay allegiance while offering little by way of clear argument or defense, but here the view itself is much harder to pin down in a precise way. Indeed, even more striking than the absence of any very clear arguments is the fact that many recent philosophers seem so eager to commit themselves to naturalism — to fly the naturalist flag, as it were — while showing little agreement as to what exactly such a commitment involves. Thus naturalism seems to be even more obviously an intellectual bandwagon than materialism. (In addition, naturalism, for some of those who use the term, seems to just amount to materialism, which would make an argument from naturalism to materialism entirely question-begging.) ¶ Is there any genuine support for a materialist presumption to be found in the vicinity of naturalism? One version of naturalism is the idea that metaphysical issues — or philosophical issues generally — should be dealt with through the use of the methods of natural science. If this is accepted, and if it is true that following the methods of natural science leads plausibly to an endorsement of materialism, then at least some presumption in favor of materialism might follow. But both of the needed suppositions are in fact extremely dubious, to say the least. There is simply no good reason to think that the methods of natural science exhaust the methods of reasonable inquiry — indeed, as has often been pointed out, there is no plausible way in which that claim itself can be arrived at using those methods.