Yup as I said, no mention of it needing to be categorically proven anywhere in there. Theories don't somehow graduate to something higher when they are categorically proven, that isn't some sort of goal. Science simply doesn't deal in categorical proof as far as I am aware. My point seems to stand.
Read the entire article from start to finish and perhaps it will help you to understand.
You are of course perfectly right that theories will change, adapt or perhaps even be discarded altogether as knowledge grows. This is a good thing.
So when you say that the theory hasn't been categorically proven yet I say "yea of course it hasn't, it is a theory, theories don't get categorically proven ever, nothing in science does, is that confusing you?".