He was in a washable house, but he wasn't sure. Now about those rats, he kept saying to himself. He meant the rats that the Professor had driven crazy by forcing them to deal with problems which were beyond the scope of rats, the insoluble problems. He meant the rats that had been trained to jump at the square card with the circle in the middle, and the card (because it was something it wasn't) would give way and let the rat into a place where the food was, but then one day it would be a trick played on the rat, and the card would be changed, and the rat would jump but the card wouldn't give way, and it was an impossible situation (for a rat) and the rat would go insane and into its eyes would come the unspeakably bright imploring look of the frustrated, and after the convulsions were over and the frantic racing around, then the passive stage would set in and the willingness to let anything be done to it, even if it was something else.
He didn't know which door (or wall) or opening in the house to jump at, to get through, because one was an opening that wasn't a door (it was a void, or kid) and t