People are under the impression that Torah is about fuzzy notions, while science deals with hard facts. In fact, just the opposite is true.
Science is limited to that which we can measure. Therefore, it cannot know time and space, but only the relative motions of objects within them. It cannot know the true causes of events, but only predict the probabilities of their occurrence. It cannot know life or consciousness or love or purpose, but only measure in general terms the consequences of such.
Torah is the blueprint by which time and space and life were made. Not a knowledge that works its way in from the outside, but speaks from within and directs us how to approach it.
Torah is not science, but with the knowledge of inner Torah, scientists would have a much greater understanding of their observations of the outer world.
True scientists (without an agenda) indeed do not claim to "know" discoveries that are based on theory, speculation etc. You are correct!
However, to be fair the good rabbi there are plenty of scientists who do claim to know these as fact (like Richard Dawkis "Evolution is a fact" in Ben Stein's expelled").
For a great essay:
Evolution - Facts, Theories, and Fiction
Dr. Zvi Shkedi, Torah and Science Institute
Atlanta
NYC, NyC
thornton, IL, usa
Silver Spring, MD