Satanus:
"The kind of person who automatically accepts what science says today, is the same kind of person who automatically accepted what science of the day said a thousand yrs ago."
I don't know if anyone here is advocating that we label every scientific theory as fact. Be careful of constructing a straw man here.
There are certain things that are definitely factual, and can be proven scientifically. One is that disease is caused by germs and viruses. Certain religions still practiced claim that disease is caused by bad spirits and you need a shaman to cast them out.
Scientific assertions are not facts but theories. The scientific consensus is that any two particles of matter attract one another with a force directly proportional to the product of their masses and inversely proportional to the square of distance between them. I just stated the THEORY of gravity. It isn't framed as a "fact", even though it is common to accept it as such (and some would say practically, it is factual to them).
A scientific theory is the best working explanation of a phenomenon that is happening (like attraction between masses) or did happen (development of plant and animal species).
"Certainly, science facts are incomplete."
I must kindly but firmly disagree. Facts are never controvertible. However theories can be improved upon or replaced, like the "Static Universe" theory once propounded by Einstein. However when Edwin Hubble discovered the relationship between red shift and distance, the weight of evidence shifted to the Big Bang theory and the expanding universe. Even Einstein abandoned the Static Universe theory when he considered the new evidence. "Static Universe" and "Big Bang" are not and never were framed as scientific facts, but rather as theories - the best available explanation as understood by a consensus of the scientific community. Scientific theories are constantly under scrutiny and review as the scientific search for the best possible explanation never ends.