Consider all. Test All. Hold on to the good.

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Changing the Subject

Go The fallacies in this section change the subject by discussing the person making the argument instead of discussing reasons to believe or disbelieve the conclusion.
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Inductive Fallacies

Go Inductive reasoning consists of inferring from the properties of a sample to the properties of a population as a whole.
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Missing the Point

Go These fallacies have in common a general failure to prove that the conclusion is true.
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Fallacies of Ambiguity

Go The fallacies in this section are all cases where a word or phrase is used unclearly. There are two ways in which this can occur. (1) The word or phrase may be ambiguous, in which case it has more than one distinct meaning. (2) The word or phrase may be vague, in which case it has no distinct meaning.
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Category Errors

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These fallacies occur because the author mistakenly assumes that the whole is nothing more than the sum of its parts. However, things joined together may have different properties as a whole than any of them do separately.

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Non Sequitur

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The term non sequitur literally means “it does not follow”. In this section we describe fallacies which occur as a consequence of invalid arguments.-

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Syllogistic Errors

Go A categorical syllogism is an argument consisting of exactly three categorical propositions (two premises and a conclusion) in which there appear a total of exactly three categorical terms, each of which is used exactly twice.
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Fallacies of Definition

Go The purpose of a definition is to state exactly what a word means. A good definition should enable a reader to 'pick out' instances of the word or concept with no outside help.
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Truths and Propositions

Go Propositions and their truth values are two elemental ingredients of logical reasoning.
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Appeals to Motive

Go The fallacies in this section have in common the practise of appealing to emotions or other psychological factors. In this way, they do not provide reasons for belief.