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Twelve voices were shouting in anger, and they were all alike. No question, now, what had happened to the faces of the pigs. The creatures outside looked from pig to man, and from man to pig, and from pig to man again; but already it was impossible to say which was which. (10.35)
Before you start blaming the pigs for being evil and patting yourself on the back for all the bacon you get, notice that when the pigs are at their absolute worst, they… look the most like humans. Ouch.