Thus, _All fish are cold-blooded_, .'.

_some cold-blooded things are fish:_ this is a sound inference by the mere manner of expression; and equally sound is the inference, _All fish are warm-blooded_, .'.

_some warm-blooded things are fish_.

The latter proposition may be false, but it follows; and (according to this doctrine) Logic is only concerned with the consistent use of words: the truth or falsity of the proposition itself is a question for Zoology.

The short-coming of extreme Nominalism lies in speaking of language as if its meaning were unimportant.