The four Gricean maxims are: Quantity. Make your contribution to the conversation as informative as required. Do not make your contribution more informative than is required. Quality. Do not say what you believe to be false. Do not say that for which you lack adequate evidence. Manner. Avoid obscurity of expression (don’t use words that your intended hearer doesn’t know). Avoid ambiguity. Be brief (avoid unnecessary prolixity). Be orderly. Relation. Make your contribution relevant.
