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It's Lamarck.
Not really ... he got a lot of things right,
but he thought that traits were acquired from the environment - rather than that the environment selected for "random" traits that "just showed up".
Remember, genes and mutations were unknown concepts in those days.
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How can you prove that this theory is correct?

In science, a theory is, by definition, proven and accepted as fact.


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A theory is never truly "proven" correct; data can be found time and time again that supports a hypothesis, which may then become a theory, but a theory doesn't really graduate to something else if it "seems" correct. Theories are always being modified as new advancements are made. "Law" (like the law of gravity) is a dated term that essentially equates to a theory in modern science.


Is it correct to say gravity is only a theory?

No. It's never correct to say that anything is "only" a theory or "just" a theory or"merely" a theory or "nothing but" a theory or an "unproven" theory.A theory can never be proven, but it can be dis-proven in two seconds. If a theoryhas been around for three hundred years and it hasn't been dis-proven yet, thenthat's a pretty good indication that you can trust the statement it makes.


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A scientific theory is an idea that is supported by a hypothesis. Once the theory is proven to be permanently correct, it is a law or fact.


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No it would be a theorem if it was proven.


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One of Albert Einstein's theories that has been proven correct is the theory of general relativity. This theory describes gravity as a curvature in space and time caused by mass and energy, and it has been confirmed through various experiments and observations, such as the bending of light around massive objects like stars.


Why is the law of gravity a scientific law- not a scientific theory?

In general, a scientific theory is a proposed explanation that has not been fully proven yet, while a law is a theory that has been proven to be true by lots of experimentation. The theory of Gravity has been tested and shown to be correct so much that it is at this point clearly a scientific law.


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There was once a theory, that electromagnetic waves might be used for communication over long distance. Your mobile phone is the proof that the theory was correct.


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