TRAINING DATA
The corpus. Whatever was in it becomes the prior.
Socialization
Family, school, religion, advertising, entertainment, news, workplaces, peers.
A model has no access to the world, only to the record of it. A child is in the same position. Long before anyone argues a position, the examples have already arrived: which jobs are respectable, which accents sound competent, which households count as families, what a normal week looks like. None of it is taught as doctrine. It is supplied as background — and that is exactly why it is so hard to argue with later. It was never presented as a claim, so there was never a moment to disagree.
Nobody sat you down and explained which accent sounds competent. You just know.