No, there's no citation needed because there are plenty of genius addicts and this study alone proves nothing. At the absolute bare minimum this would have to replicate.

> there are plenty of genius addicts.

How many is plenty? And how does that compare to the general population? The claim isn’t that addiction and intelligence are mutually exclusive. Rather, the claim is that intelligence makes addiction less likely.

Almost all that I care about mid-last century anyway. I mean give me a break, Einstein smoked. If you seriously think addiction has anything to do with intelligence then you've never been addicted and know nothing about it.

Here is a study that looks at alcoholics: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6851852/

According to the study, alcoholics had a lower baseline IQ before becoming addicted to alcohol. So that does seem to support that lower cognitive function is somehow linked to becoming an addict.

Could that also mean Einstein might have been even smarter had he not smoked

A genius addict disproves the broader claim no more than does "it was cold today, therefore global warming is a hoax". The rule can be true yet still have notable exceptions throughout history.

No, you're just intentionally ignoring the word "plenty."

There are "plenty" of cold days as well. Does that disprove global warming?

Not only is "plenty" not an objective quantity, but even an objectively large quantity is irrelevant if it's not a large percentage of the whole. 100k geniuses with addiction problems wouldn't disprove the rule if there are 1b people with addiction problems who are of below average intelligence.

As he should. Plenty is extremely vague. It definitely means more than 1, probably more than 3, but after that.

It's actually "genius" that's the problem. There aren't enough geniuses to affect a trend on their own.

You could swap "plenty" to "every" and it would still have the same problem

That’s no proof they didn’t suffer cognitive decline. Perhaps Einstein did suffer cognitive decline.

I get what you're saying but best not to say "prove it didn't.."

Better to note that since the study isn't claiming every person who smokes suffer cognitive decline showing a person who is a genius and smokes isn't a counter