Is 'unphysical' anything at all like 'unchristian'? In other words, is 'un' modifying 'physics' or 'physicists'?
It's modifying Physics. A theory that doesn't act like physics. A theory that produces no new predictions but invents details to shuffle our ignorance into different more palatable forms.
I'm thinking of, on the one hand, objective collapse, and on the other hand, global hidden variables about imagined real states -- variables which, in order to be anything like compatible with QM must mysteriously shuffle around so that each time you measure one that is the end of its domain of applicability and you'll never be able to use that information for anything.
This is a thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. The previous thread is at close to 500 comments.