The relationship between cannabis and schizophrenia is complex, with some data suggesting a causal link and other data questioning this direct causality.

“I look at the data from Scandinavia and I'm like well there you have a population that barely uses any cannabis and yet their schizophrenia rates are the same so the only way in my mind if I look at this kind of scientifically from a data perspective that cannabis could be causing schizophrenia denovo in a subset of people is that there must be an equal proportion of people for whom for some reason and somehow cannabis is preventing them from developing schizophrenia so that it's a zero sum game at the end of the day and there's no change in rates like I can't actually understand any other model that could explain this”