That taking piano lessons will make you good at math.
That being good at math will make you a good pianist.
That playing video games teaches a child problem-solving skills.
That there's any one religion whose members are as a whole more kind, ethical, moral or pleasing to God than the members of all the other religions.
That spanking is an effective form of parental discipline
That punishment in general is an effective form of parental discipline.
That artificial sweeteners are worse for you than all the calories in sugar.
That honey is healthier for you than sugar.
That you should ever tell someone who's suffered a loss that it's God's will.
That anybody ever gets fired for incompetence.
That spreading the same amount of calories over six small meals is more beneficial than over three big ones.
That there's ever any excuse for displaying moodiness or a bad attitude at work.
That there's ever any excuse for being snooty, no matter how important one's job or high one's station in life.
That the teachers in poor schools are not as good as the teachers in good schools.
That the best teacher on the planet can make a successful student out of a child whose parents aren't invested in his or her education.
That in real life Miley Cyrus is as bad a bad girl as she appears to be on stage.