You'd be surprised to find out how many people graduated from high school that don't know the most basic things about stuff. While I was a TA for college physics, I had trouble trying to make people to understand that stars are not the size of golf balls
I think I have you beat. While a TA for college chem I had to help one of the school's athletes (relatively big team for college division). To get started I had to help him understand basic conversions. So I am doing this conversion which involved time and wrote out the equation converting this hypothetical time in hours down to seconds (in a few steps).
He was very troubled and asked how I knew that. So I explained how each thing cancels each other out (nominator-denominator). And he still looked pained and said "No, how do you know THAT?" I looked at the equation and couldn't figure out what he was talking about. So I asked him to be more specific.
He looked at me in complete bewilderment and asked "How do you know there are 60 minutes in an hour?"
holmes
"What a fool believes he sees, no wise man has the power to reason away." (D.Bros)
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