discernment

(noun) the cognitive condition of someone who understands. Synonyms: understanding, apprehension, savvy. Example: "He has virtually no understanding of social cause and effect."

(noun) delicate discrimination (especially of aesthetic values). Synonyms: taste, appreciation, perceptiveness. Examples: "Arrogance and lack of taste contributed to his rapid success." "To ask at that particular time was the ultimate in bad taste."

(noun) perception of that which is obscure. Synonyms: perceptiveness.

(noun) the mental ability to understand and discriminate between relations. Synonyms: sagacity, sagaciousness, judgment, judgement.

(noun) the trait of judging wisely and objectively. Synonyms: discretion. Example: "A man of discernment."