I've noticed more that might be schizophrenic, but it wouldn't surprise me to find that some are OCD. However, as said, I Am Not a Psychiatrist, so take my layman's diagnoses for what they're worth.

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Gillian

"Now everyone was giving her that kind of look UFOlogists get when they suddenly say, 'Hey, if you shade your eyes you can see it is just a flock of geese after all.'"

"You can't erase icing."

"I can't believe it doesn't work! I found it on the internet, man!"