Ordinary sensible understanding; one's basic intelligence which allows for plain understanding and without which good decisions or judgments cannot be made.
Discernment, the act of discriminating, discerning, distinguishing, noting or perceiving differences between things, with the intent to understand rightly and make correct decisions.
Differential treatment of an individual or group to their disadvantage; treatment or consideration based on class or category rather than individual merit; partiality; prejudice; bigotry.
The quality of being discriminating; acute discernment, especially in matters of good taste.