"I dunno. It's hard to describe what kind of thing a factored-out creature is. Like, it's not a spider snake or a spider wasp or a - a dragonfly spider, I guess, or a goat spider or a monkey spider or a spider cat or a spider rat or a spiderfly. Actually there's a whole bunch of different kinds of factored-out spider, apparently, but I didn't read about them all because the pictures of Bosco's skeleton were way cooler."