"If someone shows up with a sack of infinite dragonfruit I'll be sure to let you know," Wilson says, irritation creeping into his voice but genuinely meaning what he says. "Considering the other infinite things on this ship, it wouldn't even be that improbable. Take that, conservation of mass."

He stands up. "That's the only sensible way to approach it. If we deliberately look for trouble, we could end up with much more of it than we're prepared for."