Instructions: for 11-20, Use Indirect Truth Tables to Determine, for Each

Short Answer

Instructions: For 11-20, use indirect truth tables to determine, for each given set of propositions, whether it is consistent. If the set is consistent, provide a consistent valuation.
-D ≡ (A • B)
D $\lor$ (∼E • F)
∼E ⊃ A
F ⊃ B
A $\lor$ B
∼A $\lor$ ∼B