Question 981453
(~P->Q)->(PvR)is false


So (~P->Q) is true while (PvR) is false. The generic form X->Y is only false if X is true but Y is false.

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Since (PvR) is false this means that both P and R have to be false. Otherwise, (PvR) would be true.


P is false, so ~P is true.


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~P is true and (~P->Q) is true. So Q has to be true. If Q were false, then (~P->Q) would be false.


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So 


P = false
Q = true
R = false