A theory is accepted as fact not based on the prestige or convincing powers of the proponent, nor is it based on a presupposed definition, but on the results obtained through observations and/or experiments which
anyone can reproduce
There is a very important characteristic of a scientific theory or hypothesis which differentiates it from, for example, an act of faith:
a theory must be "falsifiable''. This means that there must be some experiment or possible discovery that could prove the theory untrue.
For example, the Theory of Evolution makes predictions about the results of experiments. These experiments could produce results that contradicted the ToE, so the theory is falsifiable.
The aforementioned "Facts" are observations and the results of experiments that have verified, rather than contradicted the ToE.
If the various tests for, say, the age of the Earth, contradicted what was predicted in the ToE, then the contradiction would result in the discarding of the theory as it is.
Just as all tests and observations in genetic makeup verify what is predicted in the ToE. Darwin did not know about DNA, but his predictions were verified, rather than contradicted once DNA was tested to see if it matched the predictions.
Now, if a "Young Earth Creation Scientist" were to posit that "man was created by a deity exactly as he is today, and this creation occurred between 6,000- 10,000 yrs ago." Then we would have to look at what is scientifically falsifiable, and what is based on faith.
Deity-Faith based. This claim is not falsifiable as it can neither be proven true or untrue.
Created as is between 6,000 to 10,000 years ago.-Falsifiable. This claim can be verified by finding a sudden appearance in the fossil record of homo sapiens sapiens within the last 6,000-10,000 yrs with no evidence of previous existence of homo sapiens. Or contradicted by finding evidence of hominid to homo sapiens gradual appearance. This claim has been contradicted by results obtained through observations and/or experiments which
anyone can reproduce.
http://www.religiousforums.com/forum/evolution-vs-creationism/93692-facts-relating-evolution-4.html