"Ought to take your money. Take same cells, arrange in open pyramid of tetrahedrons. Where vertices are in common, each bloke knows one in adjoining cell—knows how to send message to him, that’s all he needs. Communications never break down because they run sideways as well as up and down. Something like a neural net. It’s why you can knock a hole in a man’s head, take chunk of brain out, and not damage thinking much. Excess capacity, messages shunt around. He loses what was destroyed but goes on functioning."