in the Analytic school of philosophy, the subject matter of philosophy, which philosophers of the Analytic school hold to be concerned with the salient features of the language in which people speak of concepts at issue. Concepts are thus logical, not mental, entities. A typical instance of the use of concept is in The Concept of Mind (1949) by Gilbert Ryle, an Oxford Analyst, which implies that the purpose of the author is not to investigate matters of fact empirically (i.e., by the methods of psychology) about the mind itself but to investigate its “logical geography.” Similarly, investigation of the logical features of discourse about pleasure or duty or remembering is concerned with the concepts of pleasure or duty or memory. To be able to use these linguistic expressions is to apply, or possess, the concepts.