Well, the probability that I would dream about a WSJ article like that, given that a WSJ article like that actually exists in this morning's paper, is the same as the probability that I would have such a dream, given that no such article is in this morning's paper. So by Bayes's Theorem, the dream isn't evidence one way or the other.

Very weak evidence, but not quite zero evidence, I'd say. Maybe there was something you saw/heard subliminally but didn't consciously notice...