Yeah, even scientists can't explain what gravity is. They put equations to it to describe its behavior but can't explain what it is or even prove that it exists.
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The existence of gravity is demonstrated by any of many apparatus anyone can build.
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But just because the effects of gravity can be consistently observed with empirical processes, doesn't mean it's always the same.
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There could be exceptions, especially when the very cause or mechanism for gravity by which it operates is not understood.
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We can see it has predictable effects but we don't know WHY these effects exist.
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We can see that the force of gravity is directly proportional to the mass of the proximate objects and inversely proportional to the square of the distance between them, but that doesn't mean we know why these proportions turn up the same time after time.
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Neither do we really understand what magnetism is, but we use it all the time, in electric motors, generators, MRI machines, compasses, electric gauges, electric watches, magnetos, solenoids, and particle accelerators, to name a few.
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We don't know how or why magnetism works but we use its predictable effects nonetheless.
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Here's a really big one: We do not understand what
consciousness is or how it works, but we use it anyway.
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