“There was a philosopher,” I said, “a few hundred years back, who said you should always go for the simplest solution. And he wasn’t talking about the easy answer. He meant the solution that involves throwing in the fewest extras on top of what you’ve actually got on hand. The fewest ifs and maybes, the fewest unknown guys who might possibly have just happened to wander up in the middle of the action. Do you see where I’m going with this?”