Making poor life choices based on emotions or personal beliefs. Or following a cause because that's what so and so follows so it must be right. Or getting unreasonably angry over another's personal choice or alignment. There is also the old fashioned education model, but I don't trust it because I know for a fact I failed a couple math classes in high school and still passed with B's. How does one make 60's on 2/4 tests and still end their year with an 84? I know I am terrible at math, or at least the tests, but I know without a doubt the education system just pushed me on through as far as math goes.

(So really I am the least reliable person to explain statistics to if our education system is to be trusted with grading ones understanding of math principles)