PHLA10H3 Lecture Notes - Lecture 15: Twin Paradox, Foundationalism, Fred Dretske

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Chris can"t win otherwise albert has 2 false statements. Elizabeth come sin 1st, donald 2nd, chris 3rd. Whether x is reliable or not depends just on x and its situation; it does not depend on us knowledge is irrelevant here. The analogy between reliability and knowledge: person = thermometer; person measures truth. P then p must be true: note the must" in clause 3: concept of necessity must be here otherwise s could fulfill (3) by accident o. Logical impossibility: impossibility based on definitions and logic. It is impossible for a prime # greater than 2 to be an even #, impossible for a bachelor to be married, impossible for a square to have only 3 sides. Nomological impossibility: impossibility based on the laws of nature. It is impossible for humans to fly merely by flapping their arms, if you drop an object, it will fall. Laws of nature don"t seem to be logically necessary.

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