People who are «converted» could be influenced not only
by indoctrination and peer pressure, but also hallucinations
induced by chemical imbalance, sleep deprivation,
dehydration, malnourishment, alcohol, drugs, etc..
To avoid confounding effects of high heat exposure, mild
dehydration was
induced by moderate exercise in a moderately warm environment (mean ± SD, 27.6 ± 0.8 °C).