showing or indicating careful judgment and discernment especially in matters of taste; the discriminating eye of the connoisseur'

having or demonstrating ability to recognize or draw fine distinctions; an acute observer of politics and politicians; incisive comments; icy knifelike reasoning; as sharp and incisive as the stroke of a fang; penetrating insight; frequent penetrative observations

[ Syn: acute , incisive , keen , knifelike , penetrating , penetrative , piercing , sharp ]