It seems likely that very heavy cannabis use starting in adolescence and continuing for many years can lead to measurable decreases in some cognitive abilities. It is possible that occasional use might also cause damage, but right now there’s no strong evidence to back that claim.
So: If cognitive harm from cannabis is a good reason to support continued criminalization, would you support a ban on high school and college football? And if not, why not?
[Cross-posted at The Reality-Based Community]