Equivocating Iq LossAnti-pot zealots claim herb kills brain cells, causes schizophrenia, etc, etc. An article in the respected Scientific American questions pot's virulence:
"Do other studies show a drop in IQ with cannabis use?
Røgeberg cites three studies in which cannabis use is not associated with declining IQ. He says that these studies show clear reductions in IQ for the heaviest smokers, but these are not permanent, and people who have stopped smoking heavily show no decline."
from this link: