Page "Platonic realism" Paragraph 18

A more modern response to this criticism of concepts without sense-perception is the claim that the universality of its qualities is an unavoidable given because one only experiences an object by means of general concepts.

So, since the critic already grasps the relation between the abstract and the concrete, he is invited to stop thinking that it implies a contradiction.

The response reconciles Platonism with empiricism by contending that an abstract ( i. e., not concrete ) object is real and knowable by its instantiation.

Since the critic has, after all, naturally understood the abstract, the response suggests merely to abandon prejudice and accept it.