I disagree. Instruments don't define a physical concept. They are used to gather data. The most useful instruments to that end are telescopes that record effects of gravity on celestial motions.Scientists can only know computational models in physics. These are successful except on the galactic scale and larger. Things like what gravity "really is" falls under metaphysics. Science often does answer the metaphysical questions with new theories, but they are left with a new metaphysical level to ponder.i may be wrong but its my understanding that scientist arent really sure what gravity really is or something like that .
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No it doesn't. We don't understand gravity because we haven't made the instruments necessary to help define it.
Claiming it is the realm of meta physics is a cop out.
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Yes, instruments gather data, that ALLOWS you to define a physical concept.