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Unformatted text preview: theoretical or speculative truths, like those of metaphysics. Consequently, if naturalism is true, no highly theoretical or speculative truths can be known (see argument above). 2. Naturalism is itself a metaphysical (highly theoretical and speculative) proposition. Consequently, if naturalism is true, it cannot be known. D. Lewis's argument that the naturalist cannot defeat these arguments 1. Suppose the naturalist appeals to some argument linking biological usefulness and truth. 2. In appealing to such an argument, the naturalist is assuming the value of human reasoning. 3. But this is just what is at issue, so the naturalist would be begging the question (reasoning in a circle). Why doesn't the same thing apply to a theist seeking to establish the validity of our reasoning? Because, unlike the case of naturalism, theism doesn't provide any basis for even a prima facie challenge to the value of our reasoning...
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This note was uploaded on 11/09/2011 for the course PHI PHI2010 taught by Professor Jorgerigol during the Fall '09 term at Broward College.
- Fall '09