Abstract

The words “idea” and “concept” have been, and still are, the source of so much confusion in psychology that we shall do well to banish them from the vocabulary of that science. I have urged this reform and have endeavoured to promote it by writing a psychology without ideas.It has seemed to me that the word “concept” plays a no less pernicious rôle in logic. But it was not until I began to look into the matter with a view to writing this article that I became aware of the desperate degree and extent of the confusion obtaining in all that pertains to the concepts of logic.