For each of the following, either construct a formal proof of validity or prove it invalid. If
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For each of the following, either construct a formal proof of validity or prove it invalid. If it is to be proved invalid, a model containing as many as three elements may be required.
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(P₁): (x) (HxIx)] (P₂): (x)[(HxIx) > Jx] (P3): (x)[- Kx (Hx V Ix)] (P₂): (x)[(x V- Jx) (IxHx)] :: (x)(Jx V Kx)
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1 x HxIx 2 x HxIx Jx 3 x Kx Hx V Ix x Jx VJx x Jx V Kx 4 5 Hy ly Jy 6 JyHy Iy 7 8 19 20 21 Jy Jy ...View the full answer
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Related Book For
Introduction To Logic
ISBN: 9781138500860
15th Edition
Authors: Irving M. Copi, Carl Cohen, Victor Rodych
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