I knew a person who died because they believed in dangerous horseshit. In the same town, another person died from a different type of dangerous horseshit - spe

I knew a person who died because they believed in dangerous horseshit. In the same town, another person died from a different type of dangerous horseshit - specifically the kambo ritual. In terms of methods dangerous horseshit outnumbers actual medical practice 10:1 at least. How do you know which one works? The latter at the very least is tested for safety and efficacy.