Although I share your sentiment in general, I would presume that @tluyben's take is fairly true to the broader philosophical view. The ritique of this view being at least as weak as the views on intelligence per se is a drop in the ocean really.

Implying, there is a wealth of thought devoted to inteligence! That fact is actually proving the conjecture in a nicely constructive way by itself, that we are thoughtful indeed, if only you believe this axiomatically like. The quintessential theorem was distiled by Descartes, of course, wherefore he is remembered.