[youdonow]

That's why all of your favorite, and history's greatest, visual artists, writers, athletes, musicians and aesthetes stay far away from any mind altering substances!

Erdos famously stayed far away from amphetamines to preserve those precious 2 IQ points.

[hnhn34]

This is a false equivalence. There is no known correlation between amphetamines and a decline in IQ. If anything, they are nootropics (they don't make you smarter but improve your short-term memory, focus, etc.). Psilocybin stimulates neuroplasticity and adult neurogenesis. Cannabis, as far as we know, does no such thing.