The Pro Evolution people say that it is a scientifically proven fact. And people who don't like it say that there are no facts in science. Only theories. But a scientific theory is different than theory in every day usage. Gravity is a theory. Germ theory of medicine is a theory.
But I guess you could still say not EVERYTHING that is a scientific theory is a "proven". String Theory and Multiverse Theory for example. That is where it gets confusing.
But I guess you could still say not EVERYTHING that is a scientific theory is a "proven". String Theory and Multiverse Theory for example. That is where it gets confusing.