 Thus, concepts offer “a common knowledge for all men and all times”, and, as such, are nothing psychological (SW VI: 120). Psychology, by contrast, investigates real thinking, and tries to determine how concepts come to be actually thought. As a thought-content of consciousness, then, a “concept” is a representation, namely one “which has as its represented [content] the concept in the logical sense” (SW VI: 120), or, as Weiss puts it, “that representation through which the repraesentandum[59]  (i.e., the logical concept) is represented in reality” (Weiss 1928:  94).[60]