All three have been proved.
Sorry, a scientific theory is never proved.
The only people, it seems, who are confusing this issue are the CS/ID folks who want evolution to be taught as a theory not a fact, but then need somehow to separate other theories from evolution so I guess we'll say they are proved (or laws). This, in turn, makes use of the layman's use of "theory" to mean essentially a guess.
Sciences have developed a method, cleverly called the scientific method, to serve as a guide to reliably figuring out how things work. It has worked pretty well for a couple of hundred years.
The problem I see is that some folks hate the results of one particular branch of science (evolution), and so are seeking through any means necessary to destroy science in general and evolution in particular.
None of those people is me.
Sorry, a scientific theory is never proved.
Sorry, your opinion on that is just that. Maybe you can take a stab at telling me the difference between "scientific theory" and theory. All the rest have scoffed,,,,and then retreated.
What you are saying is that atomic energy was never speculated about before it was used by men. And germs didn't get theorized about before they were shown to cause illness. If I misstate, please educate me.