(pvq) ∧ (p→r) ∧ (∼r)
p→r
∼r
∴ ∼p
pvq
∼p
∴q
Hui C.
asked • 08/12/18Verify is tautology by using logical equivalence
Verify is tautology by using logical equivalence:
((p ∨ q) ∧ (p → r) ∧ (∼ r)) → q
by showing what law is using
((p ∨ q) ∧ (p → r) ∧ (∼ r)) → q
by showing what law is using
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Hui C.
≡ ((p ∨ q) ∧ (∼ p ∨ r ) ∧ (∼ r)) → q (comment: since p → r same as ∼ p ∨ r)
08/12/18