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Zulip Chat Archive

Stream: new members

Topic: Disjunctive syllogism


Luiz Kazuo Takei (Sep 30 2025 at 18:31):

I have the impression I saw this somewhere but I cannot find it. Suppose I have

h1 : ¬ P
h2 : P ∨ Q

is there a single lemma that allows me combine them to produce Q?

Aaron Liu (Sep 30 2025 at 18:32):

docs#Or.resolve_left

Luiz Kazuo Takei (Sep 30 2025 at 18:33):

Thanks!


Last updated: Dec 20 2025 at 21:32 UTC

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