Things like "anyone can try it if willing to" is different for "it is selling at any sypermarket".
Any way, the exceptions don't affect a open poll as this one. But I would be interest in a research that answer this questions at different realities, such as, slums, high society, drug dealers family, public high school, private high school, etc.
Now I live in San Francisco and it's a bit of a different story here.
Why do you say that? Seems kinda silly to think that "socially accepted" drugs make someone more rational than the non-socially-accepted drugs.
i find that people who go down this path of thought often misuse or abuse words like irrational, though.
If something is socially acceptable then more people will try it because of group pressure. That's why I don't consider those to be as bad as stronger stuff. But in principle they are the same and alcohol is stronger than most soft drugs that are permitted in the Netherlands. Still doesn't seem to be outlawed in many places though...
The introductory text explains that there is no way to know if the person is answering truthfully or following the coin 'heads' rule.
When you get the results you adjust for probability of the coin toss.