For magic, we'll need a magician to counter it. If it's chemical, we can't synthesize something to neutralize the problem. If it's psychic, we'll need to get a psionic. For nanobots, we'll probably be able to make something chemical to shut them all down, but we might need to build nanobots to counter the problem.

I did. [He holds up his card.] It reminded me of Janus, God of two-facedness and doorways. Not much of a ransom note.