It isn't even a real science.
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Ghost
Issac
You just answered it yourself: people read their own meaning into them, often basing it on something that will suit them. When that then becomes true, they believe it.
Shikkichu
I know, but knowing this, why do they still do it? xmx
Issac
Those who follow them, don't know it 
Shikkichu
Psh you have an answer for everything, I'm gonna call you Mr Google <3