Quite the opposite--theories by definition can never be proven true.

A theory is a unifying and self-consistent explanation of fundamental natural processes or phenomena that constructed of corroborated hypotheses, which comprehensively, predictively, and tentatively explains all observations within its scope. Theories derive confidence not from the possibility that they might at some later time be proven to be true, but from that existing ability to explain all observations within their scope comprehensively and predictively.