“Mountains, Bruce, mountains,” the manager said.
“Mountains, Bruce, mountains,” Bruce said and gazed.
“Echolalia, Bruce, echolalia,” the manager said.
“Okay, Bruce,” the manager said, and shut the cabin door behind him, thinking, I believe I’ll put him among the carrots. Or beets. Something simple. Something that won’t puzzle him.
– Philip K Dick (1977) A Scanner Darkly