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Originally Posted by Cwocwoc
It is a narrow and irrelevant point. eg Avogadro's law is also called Avogadro's hypothesis etc etc. Back to evolution theory there is no formula for it so it has not been satisfactorily defined. Theories are proved or disproved by using maths.
Grab any any Life Sciences or general science textbook, and they'll probably spell out in the first five pages for you what a scientific fact, law, and theory are.
Generally, a scientific law attempts to describe a set of observations as a formula. If you have to say anything is dis/proven using math, it would be scientific laws, not theories (though you could certainly use math to disprove many scientific theories, and I'm sure you'll cherry pick an example).
Scientific theories attempt to build a framework or model to explain the facts that have been gathered. Generally, replacing the word "theory" with "model" will make things more clear when you're in the realm of science.
Germ theory, cell theory, and atomic theory are all examples of scientific theories that are not proved or disproved using math.
This is why evolution can be both fact and theory (the facts are observed, the theory explains how/why we see them). Likewise, gravity is a fact, theory (gravitation), and law, depending on which facet you're considering.