Question

In the space provided, derive the conclusion shown from the premises given. HINT: Don't forget about...

In the space provided, derive the conclusion shown from the premises given.

HINT: Don't forget about the derived rules, substitution rules and subderivation rules.

1. A ⊃ C

2. ~(D v A) ⊃ B   ∴  ~(C v B)  ⊃ (D • ~A)

—————————————————————————

1. A ⊃ ~(C v D)                                                                

2. ~A v D             ∴  ~A                                                                  

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