Roleplaying Intelligence

Page 15 of the 2nd edition Player's Handbook:

... the true capabilities of a mind lie not in numbers - I.Q., Intelligence score, or whatever. Many intelligent, even brilliant, people in the real world fail to apply their minds creatively and usefully, thus falling far below their potential. Don't rely too heavily on your character's Intelligence score; you must provide your characters with the creativity and energy he supposedly possesses! (emphasis mine)

I don't remember having read something like in any other edition.