Most true.

And this, surely, must be the work of the calculating and rational principle in the soul?

To be sure.

And when this principle measures and certifies that some things are equal, or that some are greater or less than others, there occurs an apparent contradiction?

True.

But were we not saying that such a contradiction is impossible — the same faculty cannot have contrary opinions at the same time about the same thing?

Very true.

Then that part of the soul which has an opinion contrary to measure is not the same with that which has an opinion in accordance with measure?