eolas/neuron/84bce166-ed13-454f-aa4b-b278e38fda7b/Negation_Elimination.md

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.