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Old 03-01-2010, 01:15 PM   #6
Pie
Gone and done
 
Join Date: Sep 2001
Posts: 4,808
They'd compare rates. If you have a bunch of sibs and the ones that medicate get psychoses at a greater rate than those who don't, then the drugs had an effect.
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per·son \ˈpər-sən\ (noun) - an ephemeral collection of small, irrational decisions
The fun thing about evolution (and science in general) is that it happens whether you believe in it or not.
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