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

Question 201

Essay

derive the conclusions of each of the following arguments using the rules of inference for M, including conditional or indirect proof.
-1. (∀x)Ix ∨ \lor ∼(∃x)Hx
2. (∃x)Jx ⊃ ∼(∀x)Ix
3. Hc / (∀x)∼Jx

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