The idea that each participant in a conversation implicitly assumes that all speakers are following the rules and that each contribution to the conversation is a sincere, appropriate contribution. The most basic conversational postulate, stating that participants cooperate by sharing information in an honest fashion:

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The "Co-operative" principle, proposed by H.P. Grice, is the foundational idea that participants in a conversation are expected to cooperate by making contributions that are sincere, relevant, and appropriate to the context, thus ensuring effective communication.

The Idea That Each Participant in a Conversation Implicitly Assumes