[hfourm]

> chemicals affect your brain in ways that simulate bizarre sensory input

Well yea... Duh? No one would disagree with that I suspect.

I think the point is that we can work backwards from these changes to better understand either a) how the brain works and an experience is perceived and/or b) the possibility that what we perceive normally is not the entire experience (to your second possibility)

In both cases obviously these are chemically induced changes/observations at their core. Doesn't take away from their novelty and certainly should be taken more seriously scientifically imo. Ofc it will land in the realm of psurdoscience otherwise.