Question: The following set of arguments involves, in each case, one inference only, in which one of the ten logical equivalences set forth in this section

The following set of arguments involves, in each case, one inference only, in which one of the ten logical equivalences set forth in this section has been employed. Here are two examples, the first two in the exercise set immediately following.


(P1): (A ⊃ B) ⋅ (C ⊃ D)
∴ (A ⊃ B) ⋅ (~ D ⊃ ~ C)

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