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Probability is determined both by the nature of our observations and by our conception of rationality.
The function of a system of hypotheses is to warn us beforehand what will be our experience—to enable us to make accurate predictions.
The only information we can legitimately derive from aesthetic and moral experiences is information about our own mental and physical make-up.
I do not believe in God… to the extent that theists have made their concept intelligible， they have given us no reason to think anything answers to it.
The principles of logic and mathematics are true universally simply because we never allow them to be anything else.