Evolution is not a "theory" in the vernacular.
(biological) Evolution (Humanity evolved from simpler organisms) continues to be a theory until it is shown or proven or demonstrated to be the case . Until then it is not a fact.
You also don't "prove" things in science, You "validate."
There is also no "burden of proof" in the scientific method. That is chiefly a legal term.
A course in analytical reading and comprehension skills can help you: 'The burden of proof is not upon the ones that do not believe in evolution' Think about the statement. And its context.
I am not getting into a pseudo-scientific cofty discussion with you - I am not interested. -or google cut and paste definitions or explanation. Do it yourself. I will say this though: The scientific method is used to test a hypothesis. If it turns out to be the case, it is validated. Such testing or experimenting if successful PROVES the hypothesis.
Evolution of humanity from simpler organisms cannot be proven or validated. Use whatever words you like. I understand that the term "theory of Evolution" refers to that all forms of life evolved from the same ancestor -That has not been proven.