Sorry for the necropost, but I have a UA question for flat earthers. I’m not a theoretical physicist, just a very curious engineer, however I believe I’ve come to understand enough to try to poke holes in UA again.
The way that dark energy applies forces on other bodies is by means of warping spacetime in the opposite way that mass warps space time via gravity. Instead of an actual force pushing you, think of it as the environment created a valley or hill and you roll forward or back, except this is in 4 dimensions. This is what warping spacetime is. If you accept that action as it’s accepted in UA, wouldn’t you need to accept gravity as at least possible? If you actually studied dark energy rather than cherry picking what scientists have come up with, perhaps you could prove yourselves wrong about gravity?