 Second, Searle argues that the principles of distinction among Austin’s categories are unclear. For instance, behavitives seem to be a heterogeneous group with little unifying principle. Similarly, ‘describe’ appears both as a verdictive and as an expositive whereas one would expect taxonomic categories to be mutually exclusive. More generally, Austin’s brief account of each category gives no direction as to why this way of delineating them does so along their most fundamental features. Searle offers a new categorization of speech acts based on relatively clear principles of distinction. To appreciate this it will help to explain some of the basic concepts he uses for this purpose.