I couldn’t think of anything better today.

perspicacity (per·spi·cac·i·ty): / pur spi KAS i tee /
noun

(1) keen perception; acute discernment and understanding; penetrating awareness and astuteness
(2) keen vision (archaic)

[From Latin perspicacitas meaning “sharpness of sight,” from perspicax meaning “sharp-sighted.”]

Usage: It’s difficult to accuse Dubya of perspicacity regarding any topic.