I remember sitting at a table with some neuroscientists in Berlin, and it turned out that they all smoked from time to time. They were really casual about it. S

I remember sitting at a table with some neuroscientists in Berlin, and it turned out that they all smoked from time to time. They were really casual about it. Sure, marijuana is bad but alcohol is worse and we all do that. This study presents an extraordinary claim but, if the comments mentioning of 20 subjects are correct, does not present extraordinary evidence.