My friend who sits diagonally in front of me. Clairvoyance is not her real name, but she, for some reason, decided that it would be her name from now on, though that decision was made while she was on a lot of sugar, so I don't know if it was the best decision. It was, however, hilarious at the time. She talks in 3rd person when she turns from her real name to Clairvoyance.
When you over think something so much that you go into the situation with the mindset that something bad will happen, and then it does because you’ve gone in with that mindset.
For example going to a job interview they you’re nervous about and overthink it and think it will go wrong so it happens because you’ve gone in with that mindset so you’ve predicted it, hence clairvoyant disease