They were fantastic stories, stories that didn't even verge on the credible, and yet my mother believed each and every one of them and dutifully reported them to me.
It's important to note that Haidt does not claim that it's impossible for reason to change our moral values or the values of others.
I'd usually open with some kind of shtick—an impersonation or a corny joke that would fall flat.
If Haidt's model is vindicated scientifically, and it does indeed entail that moral relativism or subjectivism is true, then we have to accept it.