ratiocinator
Lightly seared on the reality grill.
Just imagine Newton to never have been born. Ordinary geometric and mathematical interested humans could have calculated the very same on planetary motions as Newton, without speculating on the "spooky gravity" as a governing force - which it isn´t at all.
How would they have done that? That's a mathematical question by the way. To make your claim in the least bit credible, you should be able to demonstrate that there is a purely geometrical equivalent to all of Newton's laws.
I'll not hold my breath.
And you still haven't answered my question. Why do these theories make accurate predictions?