Is gravity both a force and not a force?

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jbriggs444 said:
In science, if you can never detect it, you can safely ignore it and let Occam's razor cut it away.

I was trying to point out a conceptual inconsistency in Newtonian mechanics. Had Einstein ignored it, we would not have general relativity today.

Demystifier said:
Before dealing with gravity and general relativity, one should ask and answer an analogous question in Newtonian mechanics: Is inertial force a force or not a force? After answering that one, the gravity case is conceptually much easier.

Yes, that's what I meant with 'forces' causing 'relative acceleration'.
 

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