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Originally Posted by MagicallyAdept
Also how do we know about the laws of physics apart from what scientists have told us? They could have it all wrong but there theories just coincidently fit in with results at the moment. People thought the world was flat at one point.
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Of course, no scientist claims that any of our theories are anything more than a description of how we understand things. That's the whole point of science.
The point is science is self correcting; when someone comes along with a new theory, the new theory is tested and if it's better, it's adopted. Theories make predictions which are tested constantly, if a prediction is wrong then we know the theory is wrong or incomplete.
For example, we know that there's two theories to describe the universe.. General relativity for the big things, and quantum mechanics for the small things.. the problem is the two don't resolve to each other, so there's a fundamental need for a new theory which resolves the two with each other.