It's a spectrum, like everything else, and the idea has existed for ages, it's just that people are now coming up with terminology for it. And yes, just like th

It's a spectrum, like everything else, and the idea has existed for ages, it's just that people are now coming up with terminology for it. And yes, just like this (faux-)Tourette's story, it is possible to push oneself around in the spectrum; I know a few people who have deliberately and consciously done that (that can of course change how you classify things, if root cause is part of the definition). Think of it as ranging from acting differently in front of family and in front of your boss, to being an actor in character, to having that character evolve on its own, to full blown DID with amnesia. The fields of psychology, neuroscience, etc are sadly still in their infancy; we really have very little idea how the brain truly works. Doctors tend to like to put people in boxes, but the brain isn't digital, it's analog, and there isn't a boolean flag somewhere in your head that determines if you have a condition or not. People are different. The medical community usually concerns itself with cases where the condition impacts people's quality of life, i.e. only the more extreme ones, but that doesn't mean anything below that doesn't exist and hasn't since the dawn of humanity.