"There is a "fact" that DNA can mutate by various means. Therefore, evolution is a "true science". Yes? Is that the conclusion you're begging me to draw?"
It is a fact that organisms vary and it is a fact that there is NO empirical evidence that proves continued unlimited variation (which is the very definition of the theory of evolution):
“In each of these pivotal nexuses in life's history, the principal "types" seem to appear rapidly and fully equipped with the signature features of the respective new level of biological organization. No intermediate "grades" or intermediate forms between different types are detectable.”
“The Biological Big Bang model for the major transitions in evolution,” Eugene V Koonin, National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, MD, in Biology Direct 2007, 2:21.