"Two problems prevent anyone from legitimately calling evolution a theory. First, there is no direct, observable experiment that can ever be performed. Scientists can measure bones, study mutations, decode DNA, and notice similarities in morphology (the form and structure of animals and plants), but they can never test evolutionary events in the past.
Some point to natural selection as a form of “evolution in action,” but natural selection can only act upon the genetic potential that already exists. What we do observe from natural selection fits perfectly with a recent creation and does not point to common descent.
Secondly, and related to the above, evolution misses the mark as a theory because all the supposed “tests” to confirm Darwinism do not necessarily and distinctively correspond to the idea. In other words, each has an alternate and equally viable explanation. A theory requires that the confirming experiments correspond to one specific hypothesis. Otherwise, the experiment cannot establish legitimacy. Evolution has no such legitimacy."