Nice article! (As always) 🙂
Just a super-naive question from a low-energy experimentalist who never properly stidied GR: givel that energy is not (globally) conserved in GR, aren't arguments like "this violates energy conservation so it can't work" a bit self-contradictory? What (likely trivial) piece did I miss?
John Carlos Baez (npub1nf4…nqe4)