Is sagacity a medical condition?

Sagacity is more about mind than body. You've probably heard someone be called a sage, meaning that the person has developed much wisdom and good judgment from experience.  Sagacity is also a noun. The word refers to insight built from information taken in and mentally processed over many years.

James Fenimore Cooper wrote in The Last of the Mohicans:


And in Fyodor Dostoevsky's The Idiot:

One of the murderers suddenly changed into a woman before your very eyes; then the woman was transformed into a hideous, cunning little dwarf; and you believed it, and accepted it all almost as a matter of course — while at the same time your intelligence seemed unusually keen, and accomplished miracles of cunning, sagacity, and logic!

Charles Dickens used the word in his novel, Bleak House:

He was really very kind and gentle, and as he stood before the fire warming his boots and rubbing his face with his forefinger, I felt a confidence in his sagacity which reassured me.