Question

6. Simplify each of the following propositions, quoting the laws you use.

(a). (P ∧ Q) ∨

[

∼ (∼ P ∨ Q)

]

(b). (P ∨ Q) ∧

[

∼ (∼ P ∧ Q)

]

(c). ∼

[

∼ [(P ∨ Q) ∧ R]∨ ∼ Q

]

(d). [

(P =⇒ Q) ∨ (Q =⇒ R)

]

∧ (R =⇒ S)​

Answer 1

Answer:

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