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Derive the Conclusions of Each of the Following Arguments Using ∨ \lor

Question 244

Essay

derive the conclusions of each of the following arguments using the rules of inference for M. Do not use conditional or indirect proof.
-1. (∀x)Ix ⊃ (∀x)Kx
2. (∀x)[Jx • (Ix ∨ \lor Lx)]
3. (∀x)(Jx ⊃ ∼Lx) / (∀x)Kx

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