The Multiplication Stone: Jon's Doppelganger

"Who are you?" Jon asked his doppelganger. "I'm Jon. Who are *you*?" "*I'm* Jon." "You can't be, because *I'm* Jon." "No. *I* am. See, I've got *this*," Jon said, holding up the stone. His doppelganger tried to grab it. "Hey, that's mine!" "I don't know who you are, but you're *not* me. And this stone *isn't* yours." The bedroom door opened and Karyn walked in. "Jon! What are you doing in my ..." She trailed off when she saw that there were *two* Jons. "Karyn," Jon's doppelganger said. "Tell this impostor that *I'm* the real Jon." "*I'm* the real Jon, obviously," Jon said. "Tell him, Karyn." She looked back and forth. There was no way to tell the difference. They both looked *exactly* the same.