11.07.2015 Views

Rational Self-Doubt - Philosophy

Rational Self-Doubt - Philosophy

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Incoherence of Cal?1. P(q) = x,2. P(P(q) = x) = 1, and3. P(PR(q/P(q) = x) = y) = 14. x ≠ yCal says:P[q/(P(q) = x . PR(q/P(q) = x) = y)] = yFrom 2. , 3., Cal, and *, we get P(q) = y.But by assumption 1., P(q) = x. Contradiction.32

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