This meaning is implied by the context in which it is spoken; these kinds of effects of meaning are called conversational implicatures.
2.
Conversational implicatures are made possible, according to Grice, by the fact that the participants in a conversation always assume each other to behave according to the maxims.
3.
He locates his work on pragmatics under what he has called the Gricean umbrella ( 2000 : 12ff . ), a broad theory of communication that focuses on the role of conversational implicatures.