Consciousness as Unscientific Because it Cannot be Defined

Materialists sometimes regard the concept of “consciousness” as unscientific on the grounds that it cannot be defined. This overlooks the fact that there cannot be an infinite regress of definitions. All definitions reduce ultimately to certain primary concepts, which can be specified only ostensively; axiomatic concepts necessarily belong to this category. The concept of “matter,” by contrast, is not an axiomatic concept and does require a definition, which it does not yet have; it requires an analytical definition that will integrate the facts of energy, particle theory, and more. To provide such a definition is not, however, the task of philosophy, which makes no specialized study of matter, but of physics. As far as philosophic usage is concerned, “matter” denotes merely the objects of extrospection or, more precisely, that of which all such objects are made. In this usage, the concept of “matter,” like that of “consciousness,” can be specified only ostensively.¹