Ross talks about the concept that altered states don't have useful information is completely invalid. He mentions how mental illness, drug use, and even dreams have played a role in creating advances we still use in science today.
Geniuses who used drugs
http://www.salon.com/2013/08/16/10_famous_geniuses_who_used_drugs_and_were_better_off_for_it_partner/
Scientific advancements from dreams
https://www.famousscientists.org/7-great-examples-of-scientific-discoveries-made-in-dreams/
https://spiritualphoenixstudios.com
