[eraser2005]

It never will, unless you can observe it (ie, create a universe).....

Much evidence has been found in support of it, though.... not to say the case is closed....

Of course, relativity isn't fact, either, by the same standards.

[WhistlingPastTheGraveyard]

It never will, unless you can observe it

So then, there should be not problem with calling it a "theory". Since that's exactly what it is.