eolas/neuron/4e98d18e-1a79-4e78-a4ac-f7e3a2de9887/Negation_Elimination.md
2024-10-21 23:11:48 +01:00

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tags
logic
propositional-logic

Negation Elimination

Like the introduction rule for negation, the elimination rule also works by deriving a contradiction. It is basically Negation Introduction in reverse. Instead of starting the sub-proof with a true proposition from which you derive a contradiction, you start with the negation of a proposition, derive a contradiction and then assert the positive of the negated proposition you started out with.