Question: 7 Consider a vocabulary with only four propositions, A, B, C, and D. How many models are there for the following sentences? a. B

7 Consider a vocabulary with only four propositions, A, B, C, and D. How many models are there for the following sentences?

a. B ∨ C.

b. ¬A ∨ ¬B ∨ ¬C ∨ ¬D.

c. (A ⇒ B) ∧ A ∧ ¬B ∧ C ∧ D.

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