I note the question "Time and space – a subject of metaphysics?" might be very near to my question, and maybe the answer is there somewhere. In that case I - as an amateur - would be grateful for a simplified answer.
I posted a thought earlier on physics.SE (No 272653) where I speculated that Newton might have considered bent space (but with classical time) so that Newton´s ball would spin fine in a curved surface.
I now would like to take that thought a little further and think about the question: might we not alternatively consider – with impunity - the bent space-time in the theory of relativity being in the category of initial concepts on which theories is built, rather than being a theory in itself in Popper’s sense?
I am assuming we disaggregate the initial concepts time and space from the formulas applicable to physical bodies entitled to both time and location.
I believe such a question might fit better in this forum.