Do we know if alcohol decreases gray and white matter volumes? Could the causation run in the reverse direction? Bi-directionally? Or could there be some common cause (e.g., proneness to "risky" behavior) that leads to both?
https://en.wikipedia.org/wiki/Correlation_does_not_imply_cau...
Rather than disregard every study, I just sort of internally give it a 50% weight and move on. Maybe it's bogus, maybe it's not, but surely some of them are correctly identifying causation.
Life is too short to quibble about this crap.
Well, it's still true, and still applicable.
> You're not wrong, but you know, sometimes it is causation.
No, I don't know, and neither do you. That's... kind of the problem.
Yup, so have a drink when you want, or don't. We will all die eventually.
Then why bother doing science at all?
There are ways to determine the correlation vs causation problem, but yes it takes more effort - possibly redesigning studies, follow up studies etc.
But that's just the price of knowledge. And knowledge is worth quibbling over.