Never heard of a single one that had problems.
50%? You're ignorant and alarmist.
But in all seriousness: can you explain why you feel so strongly about this?
EDIT: the person I responded to edited their comment to make it 'milder'.
I was never into drugs like friends, if that's what you're insinuating. I tried a few, but beer was my drug of choice, and nicotine for a while.
There are polls where something like 40-50% of UK teenagers (and probably US) had tried weed.
If this guy were even vaguely right we'd see an epidemic of metal health problems right now.
There's plenty of evidence that pot smoking can at the very least exacerbate problems, which strikes me as blindingly obvious when it comes to any substance that has mood altering effects as strong as weed, and I have just as much anecdata to support that view.
That said, I guess I can understand the frustration. I don't know where you live and what the status of weed is, but as a Dutch person I do realize that I don't (often) have to deal with the 'weed is evil' argument, and consequently it's easier for me to not get too upset about it.
Because he doesn't like BS arguments?
And because "so strongly" is not based on some objective measurement, but what you could gauge from a random comment. Maybe he likes/is used to using strong language (e.g. like Linus is) without necessarily feeling that "strongly" about it.
I agree that they're BS, but they're common and pernicious, and as such worth a proper response, frustrating as that might be.
> And because "so strongly" is not based on some objective measurement, but what you could gauge from a random comment. Maybe he likes/is used to using strong language (e.g. like Linus is) without necessarily feeling that "strongly" about it.
Fair enough. I got that impression because of some other comments by the same person in this thread, but you're right, I might be reading into things.
Just that I find a question like "why do you feel so strongly about X" can be infuriating, and make the other indeed feel strongly (when they were just casually writing their opinion with some strong words before).
Kind of like "relax" can make someone angry ("I AM relax") when they were perfectly relaxed before.
http://www.thelancet.com/journals/lanpsy/article/PIIS2215-03...
But it states that there is a well established link between cannabis and psychosis.
The article you linked examines psychosis outcomes after quitting marijuana. It does not show evidence that psychosis is caused by marijuana.
In fact, the article is similarly misleading, as it makes reference to two studies which show, in the article's words, a "link" between psychosis and cannibus use. However, the two articles cited for this assertion [0][1] similarly only discuss a correlative link between psychosis and marijuana.
While the correlative relationship between marijuana and psychosis is well established, there is anything but a consensus for the causal relationship between illness and marijuana.
As they say, correlation != causation.
Edit: furthermore, I encourage you to browse the wikipedia page [2], which supports my assertion with multiple sources: neither consensus nor causal link has been established. You are spreading potentially harmful misinformation.
[0]Arseneault, L, Cannon, M, Witton, J, and Murray, RM. Causal association between cannabis and psychosis: examination of the evidence. Br J Psychiatry. 2004; 184: 110–117
[1]Stepniak, B, Papiol, S, Hammer, C et al. Accumulated environmental risk determining age at schizophrenia onset: a deep phenotyping-based study. Lancet Psychiatry. 2014; 1: 444–453
[2]https://en.m.wikipedia.org/wiki/Long-term_effects_of_cannabi...
If something that attacks your lifestyle or a dependency of it and you can not bring arguments forth, this does not give you the right to silence the debate.
Though it did probably exacerbate it.