Actually, understanding and being able to replicate things isn't a very solid argument against creationism.

I'm reminded of a short story illustrating this point.

There was a man who believed he could do anything God could do, so God challenged him. "Can you make man from dust?"
The man picked up the dust and blew life into it, and there it was.
Then God said, "Very well done, except now, try to do it without using My dust."