“For ever, O LORD, thy word is settled in heaven.”
When I taught science, I drilled into my students important aspects of scientific method. Take two tubes, each containing a different clear solution. We then mix the solutions, and they turn green. If we do the same experiment tomorrow, with the same amounts of solutions, at the same concentrations, at the same temperature – in other words, all the conditions are the same – then we will get the same result. We would not expect the same materials to gently turn green one day, and explosively turn orange the next. That is why it is a point of principle that scientific experiments are repeatable. This is also why, as science teachers, we got students to write down their experiments. We always did so in a regimented format, noting the Apparatus and Materials used, then the Method (how we did the experiment), the Observations (it turned green), and finally the Conclusion – what we had learned from the experiment.
Evolution is not like that. An evolutionist supposes that inorganic molecules turned into a cell, or that an ape-like ancestor became human. These things are not repeatable. That fact alone does not falsify the event. God made birds on Day Five, but we cannot repeat that event, either. Both are, scientifically, suppositions of one-off events in the past, so we call them historical science, as opposed to the former being operational science. The true event is the one where we have the eye-witness account – and the only eye-witness was God Himself, recording what He actually did in Genesis 1.