> A university acquaintance went acute schizophrenic shortly after developing a pot habit, that could be a coincidence but the timing is suspicious.
Early adulthood is when mental illness often sets in, especially illness like Schizophrenia. You're implying cause one way without considering the other likely alternatives:
1) Your acquaintance started smoking a lot of pot because of the onset of early schizophrenia symptoms as a coping mechanism.
2) They are unrelated and early adulthood is just when people experiment more with drugs, and also when conditions like Schizophrenia start to manifest.
> A second cousin became mentally retarded immediately after smoking a joint. He's now a 30 year old who can't tie his own shoes.
I don't know what to say to this other than nobody's ever established an even remotely plausible link between these two things, assuming you aren't being hyperbolic.
Early adulthood is when mental illness often sets in, especially illness like Schizophrenia. You're implying cause one way without considering the other likely alternatives:
1) Your acquaintance started smoking a lot of pot because of the onset of early schizophrenia symptoms as a coping mechanism.
2) They are unrelated and early adulthood is just when people experiment more with drugs, and also when conditions like Schizophrenia start to manifest.
> A second cousin became mentally retarded immediately after smoking a joint. He's now a 30 year old who can't tie his own shoes.
I don't know what to say to this other than nobody's ever established an even remotely plausible link between these two things, assuming you aren't being hyperbolic.