  Wright's emphasis on verification, his pluralism about induction, and his focus on the logical character of scientific principles together show that he had absorbed important aspects of scientific positivism. He often highlighted scientific theory as classificatory (PD 363) and emphasized the relating of higher and lower levels of generality as the hallmark of science. He referred to the positivists often and to Comte in particular. In a passage that parallels Auguste Comte, Wright said that every scientific distinction is of value in classification and “must coincide with and be of use as a sign of other distinctions — that is, be a mark of the things distinguished by it” (PD  370).[7]