Q-principle

Etymology
Q stands for.

Proper noun

 * 1) In the neo-Gricean semantics and pragmatics of : a reformulation of 's maxim of quantity combined with the first two submaxims of manner, stating: "Say as much as you can (given R)", and leading to the implicature that if the speaker did not make a stronger statement (or say more), then its denial is (implied to be) true.