The Republic by Plato Part 5 Page 17

falls into the practice against his will. When he thinks that he is reasoning he is really disputing, just because he cannot define and divide, and so know that of which he is speaking; and he will pursue a merely verbal opposition in the spirit of contention and not of fair discussion.

Yes, he replied, such is very often the case; but what has that to do with us and our argument?

A great deal; for there is certainly a danger of our getting unintentionally into a verbal opposition.

In what way?

Why we valiantly and pugnaciously insist upon the verbal truth, that different natures ought to have different pursuits, but we never considered at all what was the meaning of sameness or difference of nature, or why we