I thought we were discussing psychoactive effects, not lethality.
It's a decent measure for how much a certain amount of a drug is likely to cause immediate important effects in the body.
LSD does cause significant psychoactive effects with one thousandth of that amount, which suggests that for a typical isolated dose, LSD is safer than caffeine and amphetamines. Not to mention that LSD is not as addictive.
But I don't think that invalidates my underlying point regarding caffeine, even if the lethal dose is not a perfect measure.
Of course there is, and it's obviously a positive correlation.
I think you just proved you don't understand what a correlation is...
If you wouldn't mind reviewing https://news.ycombinator.com/newsguidelines.html and taking the intended spirit of the site more to heart, we'd be grateful.
“Overdose: There have been no documented fatal human overdoses from LSD”
https://en.m.wikipedia.org/wiki/LSD
Toxicity and psychoactivity are completely independent from one another. If you can’t understand that there’s not much else I can say to you.