646, it wouldn’t hurt you to do a little research into gravity as an observable fact. It is not observable, only the effects of gravity are observable. But we may be in error when we attribute it to gravity. I admit that alternative theories are not as compelling as gravity is, but that does not prove gravity exists. In a few years we might discover a new thoery to attribute all of our observable facts to (I freely admit that this is not likely in my mind, I am just pointing out that we really do not have a leg to stand on). Meanwhile, it does not hurt to register in your mind that your entire frame of reference, and your entire basis for physics, is only based on an unprovable theory.
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