Level.eleven is correct in that no matter HOW proven something like Evolution or Creation is it will not be considered a LAW like gravity because it is not repeatable. In Evolution terms a fish that turned into a reptile one day and the next the same type of fish could turn into an amphibian.
In Creation- well you just don't see the universe getting created more than once do you?
This is also incorrect in many cases.... rapid evolution of bacteria caused by certain medicines are tests that are repeatable and have yielded the same exact results thus making them considered "fact".... with that said "facts" should not be confused with "absolute truth" and scientific facts exist independent of theory.