Ah, gah. I'm not having that, it's delusional. If you're writing a delusional character, fine, again it falls into the POV/ironic state discussed above - but it had better not turn out to be true. It's like dreams: count the number of dreams that mean something in real life, against the number of dreams that mean something in fiction, and the disproportion tells you all you need to know. Epiphanies are just the same; they're writerly cop-outs, the epitome of fuzziness.

If your character knows something, and they're right, then there is a 'how', whether they know it or not - and the writer had damn' well better know how, and the reader had damn' well better learn it, because 'epiphany' on its own simply will not do.

Rant over. Dear me, I seem to have punchable buttons...