Earlier quoted context omitted.
Some of the smartest programmers I know smoke marijuana quite regularly. I don't know if they all smoked at an earlier age but I know that 2 of them did.
I knew some top students in college who started smoking weed then and continued. They're still programmers or scientists now, which isn't surprising given their education and talent, but something's wrong every time I talk to them. They seem scatterbrained and unable to remember what either of us said a minute ago. Edit: Forgot to specify, they're in their late 20s now.
I behave like that occasionally when I have too many unrelated tasks at once and am a little stressed. I hope people don't think it's because I was high.