Well, you could pay attention to who I hang around with... then if I said "I know who they are," you might guess they're one of those people. If I said "I don't know," then you would know it's no one I've met personally and you could narrow it down that way.

Sorry Athena, even if it's a slim chance, I can't do it.

...but thanks for letting me set it out again. Kahk-kahk-kahk.