1. People either genuinely crazy
or so woefully misinformed about how the world works, the bases for their
decision making is so flawed they
may as well
2. People with a worldview which lead them to disagree with what you consider rationality
even though they
arrive at their
positions through rational means.
3. See also birther
vs. Alan Keyes is proof
. Keyes was from out of state, so you can eliminate any established political base; both
candidates were black, so you can factor out racism; and Keyes was plainly, obviously, completely crazy. Batshit
crazy. Head-trauma crazy. But the twenty-seven percenters in Illinois voted
for him. They
put party identification, personal prejudice, whatever ahead of rational judgement. Hell, even like 5% of Democrats voted
for him. That's crazy behaviour. I think you have to assume a 27% Crazification Factor in any population.