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Backstop-
I'm not taking tips from a man who says gravity is a property of matter
I stand by my comment. Gravity means weight or heaviness. If that isn't the property of matter which curves space-time, I'm not sure what is. Mass remains ambiguous, which is why we have to disambiguate between inertial mass and gravitational mass for the time being. If somebody can prove that inertial mass ≣ gravitational mass, the ambiguity will go away.
gbj_tester
Being careful about that to which you are referring is at the core of this thread.