> we understand gravity very well, at least in the sense of the word that physicists are used to (emphasis mine) As someone with a background in mathematical

> we understand gravity very well, at least in the sense of the word that physicists are used to (emphasis mine) As someone with a background in mathematical relativity, I would like to note that GR actually is not very well understood at all. Physicists seem to focus on the few simple solutions to Einstein's field equations that people have found through educated guessing, but there a ton of questions about the field equations that are open to this day.