 At a more detailed level, he distinguishes four categories with more specific maxims. The category of Quantity includes two injunctions, one to make your contribution as informative as is required, and the second to make it no more informative than is required. The category of Quality is governed by a supermaxim: “Try to make your contribution one that is true”. The category of Relation has a single maxim, “Be relevant”, while the final category of Manner has a short “super” maxim “Be perspicuous” which has various submaxims (1989, 27).