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

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Paul M. Churchland on Commonsense and Cognition

You came to this book assuming that the basic units of human cognition are states such as thoughts, beliefs, perceptions, desires, and preferences. That assumption is natural enough: it is built into the vocabulary of every natural language. And each state is typically identified by way of a specific sentence in one’s natural language: one has the belief that P, or the desire that Q, for example, where P and Q are sentences. Human cognition is thus commonsensically portrayed as a dance of sentential or propositional states, with the basic unit of computation being the inference from several such states to some further sentential state. ΒΆ These assumptions are central elements in our standard conception of human cognitive activity, a conception often called “folk psychology” to acknowledge it as the common property of folks generally. Their universality notwithstanding, these bedrock assumptions are probably mistaken.


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