A brain infection that causes a person suffering from it to be physically incapable of admitting a mistake. Saying phrases such as "
I was wrong" or "I must have
misremembered" create an acute sensation of pain, so the sufferer will do everything they can to avoid speaking those words. A common symptom is the invention of fanciful theories about a
Parallel Universe and/or Time Travel to explain away memory lapses. This is a communicable disease. As of yet a cure has not been discovered, though taking a break from one's smart phone and/or computer and taking a walk outside does seem to soften the severity of the symptoms somewhat.
Billy: Yo, what's up with Jimmy? Have you noticed that he can never admit when he's wrong about something, even when it's super obvious?
Zachariah: Don't be too hard on him, Billy, he has
the Mandela Effect. His brain is
all messed up.
Billy: Ouch, poor bastard! I guess I'm going to have to avoid him until he gets better -- the last thing I need right now is to catch that too.
Zachariah: Smart idea.