it all sounds real complicated to me. maybe just pour water on them or something

Somewhere there's a person that automatically thinks every other person they meet is a robot. Prior to trusting the stranger with any information at all, they put them through a series of qualifiers to determine if this person is, in fact, a robot. These qualifiers are simple. They look for imperfections, as the creation of human robots hasn't quite reached a level where unique imperfections can be added to each one individually. Sickness, odd body shape, personality disorders. It's become more complicated over the years as robot makers have become more advanced, but for now this person is content hanging around crazy, sick people with odd body shapes.