Do you ever hear someone express views that you think that at some level they should understand don't make any sense? Like when my grandmother didn't agree with me that Michael Jackson had been framed for pederasty crimes by people who wanted to get a big bunch of dollars from him, because to wuote her, "Do you really think people would do that kind of thing for money?" Leaving aside the issue of whether Michael was guilty or not, at some level she must have known that people will lie for money.
So... what have you heard people say or believe or think that at some level they must have known was untrue?