Ability to Make Good Judgments

Ability to make good judgments is SAGACITY

SAGACITY meaning
noun
1. acuteness of mental discernment and soundness of judgment.

Historical Examples

This man is married to a handsome woman, whose fidelity he has perpetually been doubting from no cause except his own sagacity.
Adventures in the Moon, and Other Worlds,John Russell Russell

And his sagacity on this occasion was at that time looked upon as next to divine.
Letters on England

Her sagacity was at fault, if she persuaded herself that the returned emigrant-priest would bring harmony into public counsels.
Chambers’s Edinburgh Journal, No. 445