If you have a manual universe set off a list of symbols, if you remove an element from that list does it automatically get removed from the universe or somehow update off of that list?  Or does it take in that list once and that is the static universe you have no matter what happens to that list afterward.  Long story short, I'm looking to remove elements from my manual universe after I've defined it haha.  Let me know if I'm doing things right by just removing the element from the symobols list passed into the manual universe.