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One of the De Morgan's laws states ¬(p ∧ q) ≡ ¬p ∨ ¬q . Does that also apply to three propositions p, q, and r for example? Like would ¬(p ∧ q ∧ r) ≡ ¬p ∨ ¬q ∨ ¬r work?
7 years ago

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Steve
yes. Think about it
p^q^r is true only if all three are true
so, ¬(p^q^r) is true if any one of them is false.
7 years ago

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