Success in investing doesn’t correlate with I.Q. Once you are above the level of 25; once you have ordinary intelligence, what you need is the temperament to control the urges that get other people into trouble in investing.
If you would stand well with a great mind, leave him with a favorable impression of yourself; if with a little mind, leave him with a favorable impression of himself.
Apparently, an undocumented side effect of dope is a gross overestimation of one's own intelligence. Dopers become convinced they've hidden their stash so well a cop won't find it. They're always wrong.