Ooh, excellent point, that! Though I guess, it might be possible for us to learn of Claire's father's identity long before she actually meets him.

I wouldn't really mind for him to be Nathan as much as I would the fact that it was OMG SO OBVIOUS! And much of fandom is going to be so smug and post "I told you so"s all over the place. Annoying, much?

Either way, I subscribe to your logic wholeheartedly. It wouldn't make much sense by now.