[gomaaa]

For the sake of argument, say we were to accept the commonly used definition of 'theory', namely: "An assumption based on limited information or knowledge; a conjecture."

Then we would need to come up with a new word to describe evolution, such as: widelyacceptedthoroughlytestedfalsifiablesetofexplanations

As in, "we are debating whether or not the widelyacceptedthoroughlytestedfalsifiablesetofexplanations
of evolution should be taught in biology class."

It doesn't quite roll off the tongue as nicely.

[BMCDA]

And we'd also have to replace the word 'theory' in every older scientific paper or book before 'theory' became the vernacular "assumption based on limited information or knowledge; a conjecture".
Or at least we should write a disclaimer which states that the text in question is from a time when not every Tom, Dick and Harry "just had a theory".