 Grice did not elaborate much on the notion of conventional implicature, but many other authors have tried to give more extensive theories of it, including Lauri Karttunen and Stanley Peters, Kent Bach, Stephen Neale, and Christopher Potts.To conversationally implicate something in speaking, according to Grice, is to mean something that goes beyond what one says in such a way that it must be inferred from non-linguistic features of a conversational situation together with general principles of communication and co-operation.The general principles Grice proposed are what he called the Cooperative principle and the Maxims of Conversation.