This exactness will, perhaps, be judged very troublesome; and therefore most men will think they may be excused from settling the complex ideas of mixed modes so precisely in their minds.

But yet I must say, till this be done, it must not be wondered, that they have a great deal of obscurity and confusion in their own minds, and a great deal of wrangling in their discourse with others.
10.

And distinct and conformable ideas in Words that stand for Substances.
In the names of substances, for a right use of them, something more is required than barely DETERMINED IDEAS.

In these the names must also be CONFORMABLE TO THINGS AS THEY EXIST; but of this I shall have occasion to speak more at large by and by.

This exactness is absolutely necessary in inquiries after philosophical knowledge, and in controversies about truth.