Adjective : to exhibit perspicacious judgment.    From Dictionary.com. 

Her courage and perspicaciousness are second to none.    From Wordnik.com.  [Do you worry about what black people will think if Barack Obama loses?] Reference

Portia smiled quite genuinely; she was fond of Lady O, but Simon, in company with most gentlemen of his ilk, found her perspicaciousness somewhat scarifying.    From Wordnik.com.  [The Perfect Lover]

In Elizabeth, for instance, Imam Heshaam Jaaber is credited with avoiding -- through dint of his personality and perspicaciousness -- riotous situations such as Newark's.    From Wordnik.com.  [1967: Plainfield and 10 other NJ towns besides Newark] Reference

Publisher Glenn Yeffeth, whose perspicaciousness in his business is thoroughly proven by the fact that his BenBella Books published both Choice: The Best of Reason and the paperback edition of my This is Burning Man, runs the numbers and shows that, surprise, that's some mighty self-serving reasoning by the New York publishing barons.    From Wordnik.com.  [Reason Magazine - All Reason Articles from the Past Year: Page 1] Reference