Facts and theories are different things, not rungs on a ladder of increasing confidence. Apologies to Steve Gould for stealing his words, but truly, no one has said it better.
Facts are the world's data. Theories are structures of ideas that explain and interpret facts. Einstiens theory of gravitation replaced Newton's, but apples continued to fall to the ground exactly the same way as they did before.
Establishing a fact is done through observation and what we experience with our senses. THEN science begins. Science explains facts, it doesn't create them.
Point is, if you are waiting for science that is a proven fact, you've got a long wait ahead of you!