Ed: My friend Dirk is a college sophomore at a state university in upstate New York. He is blonde, loves surfing, and has a very laid-back personality. Mary: I bet he’s from California.
Having blonde hair, enjoying surfing, and having a laid-back personality are qualities people stereotypically associate with Californians--and this despite the fact that a majority of Californians are not Caucasians. But of course many people who are not from California also have these three qualities. And given that Dirk attends a state university in upstate New York, it is unlikely, in fact, that he comes from California.