Question

In: Computer Science

Assuming binding priority (¬, ∧, ∨, →), are these sequents valid or not? If they are...

Assuming binding priority (¬, ∧, ∨, →), are these sequents valid or not? If they are valid, how

do you prove it? If they are not valid, what would the truth table be?

1. A → B, C → D ⊢ A ∨ C → B ∧ D

2. A ∧ ¬A ⊢ ¬(B → C) ∧ (B → C)

3. (A ∧ B) → C, C → D, B ∧ ¬D ⊢ ¬A

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