[The Mirrors have, so far, been so obviously wrong in some way or another when compared with their Reals that just that little bit of acting is enough to convince Frank he's talking with Percy. Later, that is going to bug him for days.

But now, he just... sighs and nods to agree.]

Yeah, you're right. Annabeth pointed that out too... but that means we have to find another way to stop them. Having them around kind of freaks me out.