This is educating you as it has me. The onset of psychisis has not been linked to any general population. Only compromised or at risk populations have shown mj will cause psychosis and i cant recall any that demonstrate permanent....which might exist. I just don't recall.
Like i said . Terns and at risk populations have shown effects of mj smoking. There just isnt much research out there and people are making false claims and conclusions based on a handful of studies that dont show what people ascribe to them.