compared with your garden variety amnesia, changnesia is immeasurably more complex.varied and seemingly random symptoms, its resistance to both traditional and new age medicine, why changnesia affects the memory but not the ability to make forced puns-- these are all things we can study now that someone finally has it. - i first met chang when i hired him as a spanish teacher at greendale. then he became a disgraced student, psychopathic music major, homeless vent dweller, security guard, keytarist, power hungry warlord, and now, kevin. it's sad to see him like this. well, it's mixed. he was pretty terrible before. - i'm developing a theory which some find controversial. perhaps chang actually used to be kevin, went crazy, and became chang. and then, at some point, chang hit his head, went un-crazy, thereby reverting back to regular old kevin again. - that makes no sense. science tells us hitting his head would only cure him if hitting his head was the original cause. - told you it was controversial. - here at greendale, we accept all students, whoever they may be or