[PRATT. "Theory" in a scientific context is different from the common use of the word; atoms, relativity, and gravity are theories too. Evolution is both a fact and a theory.]

That's just word play. Science used to be much more approachable and practical before the time of godlessness. A theory was a theory no matter who used the word; it meant the same thing. And it was understood to mean unproven. Generally we didn't think gravity was an unproven theory and likewise we didn't think the atomic theory or relativity were unproven. We didn't call them theories then. Rather we considered them proven theories or science.