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

question 18

Essay

derive the conclusions of each of the following arguments using the rules of inference from section 3.2 (MP, MT, DS, HS, Add, Conj, Simp, CD).
-1. (A ? B) • (C ? D)
2. E ? A
3. ?F $\lor$ E
4. ??F / B

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