mental caliber

Human derelicts of a low mental caliber are the dupes of these matrimonial agencies.

In a man of his peculiar mental caliber it might well seem that there could be no variation to the sum.

Men of firmer mental caliber might have found refuge from such a situation as this in an absorbing intellectual pursuit.

One is Their judgment of your mental caliber—usually too small—the other is your judgment of Theirs—usually too generous.

You have merely made a few excited and dogmatic assertions about my mental caliber.