"No, I think that seems like too many," Bell says, on reflection. "At least not that many different sorts. Maybe if two people have the same kind one of them can pick up one pound without touching it and the other can pick up two pounds without touching it and so on. There could be infinity of that. But any two people with magics different besides in their numbers should be able to explain to each other how they're different in English without taking forever. So, it can't be infinite kinds."