Modus Tollens is a rule of inference in propositional logic that states that if we have a Material Condtional that has a false consequent, then we may infer the negation of the antecedent. In other words, if P implies Q is true and Q is false, then we may infer that P is false. In rule form, this is often expressed as

\frac {P \rightarrow Q, \lnot Q}
{\therefore \lnot P}

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.