I'm exploring all possibilities. In the world of the thought
   experiment, we know that x cannot = "SALAMI" [or whatever].
   Therefore, without any ADDITIONAL constraints upon the system, x
   can equal anything else. It is an open variable with one single
   rule: It cannot = "SALAMI". This says nothing else about what it
   *can* be. The possibilities are _almost_ endless. == It's a
   useful tool within the scope in which it functions. I wouldn't
   utilize it as a foundation of the Universe. I suppose one could
   but all those excluded middles would have no place to go. ==
   Mathematician: "Everything follows the rules of math". Chemist:
   "Everything is chemistry" Logician: "Everything is based on
   logic" Evolutionary Biologist: "Everything analogized
   successfully to Evolution". Take your pick. Or don't. ==