Heck, I've done substitute teaching in a relatively affluent suburb of Austin, Texas and I find there are some really dim human creatures amongst us. Factors yo

Heck, I've done substitute teaching in a relatively affluent suburb of Austin, Texas and I find there are some really dim human creatures amongst us. Factors you noted all potentially relevant. It's frustrating to hear somebody say "Oh just reason with them!" when sometimes a certain contingent of 14 year olds are kind of lacking whip cracking in the bigger picture. Tenacious is good. Stubborn is not.