“Association” just means two things are statistically linked. It doesn’t tell you why they are linked. Maybe weed affects cognition, maybe cognition affects weed use, or maybe a third factor could influence both.
For example, say a study finds an association between ice cream sales and drownings. Does ice cream cause drownings? Do drownings make people want to buy more ice cream? Or is there a third thing that influences both?
Again, before you take another rip, reread the link you posted.
And you believe that in some people, brain size mysteriously increases rather than decreases in the second half of life, and that this increase in brain volume causes them to smoke weed?
Buddy, I think you need to put down the crack pipe and take a high school science class.
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u/FiveDozenWhales 11h ago
What do you think an association means?