3 ms·

It's basically a semantic issue but I don't think the negation of an undefined proposition is true, I think it is undefined. (Thankfully the universe does not r

• ben_w 4y ago
  That I agree with. But, Earth.x = 42 (in some arbitrary coordinate space), if I understand correctly there isn't a sub-light coordinate space in this universe where Earth.x = undefined.
  • whatshisface 4y ago
    Positions are defined, but they're different in every coordinate system, which makes "the center of the universe," by itself, undefined.
    • ben_w 4y ago
      That's not the reason why the centre of the universe is undefined. By analogy, while spherical coordinates are arbitrary, latitude is defined. Arbitrary, but defined. But the centre of the Earth has an undefined latitude, and a topological subspace consisting of just the surface of the Earth can't hand-wave past that by pointing out that's just a coordinate singularity that can be safely ignored — there isn't a center of the Earth anywhere in that subspace. If the universe is flat and finite (looping), this problem still exists. And if the universe is unbounded (infinite), that has a different problem because you can't properly define a median of an infinite set[0], so no center exists. If it just stops suddenly after a certain amount of space, then we get to have a center, but there's no sign of that. [0] I think. Infinity is easy to get messed up with.
      • rbanffy 4y ago
        > That's not the reason why the centre of the universe is undefined. Be patient. It hasn't been evaluated just yet.