Negatronic brain
From Jenny Everywhere Wiki
Studying Pessimist-242's strangely downcast disposition, “amateur researchers at the Department of Cupid Anatomy” once hypothesised that he had a negatronic brain instead of a positronic brain. The Department of Physics found this coinage “ridiculous and entirely unscientific”. (PROSE: Acquaintanceship-982 and the Missing Mail Mystery)