We all know the old creationist adage which claims evolution is simply just another “theory,” disqualifying it from being reliable as factual evidence.

Probably the most frustrating aspect of this argument is that it reveals the creationist’s lack of understanding of what the word “theory” actually means when applied to science – or most things in the real world for that matter.

It’s that misunderstanding that reveals itself in the video below when a student questions her professor, asking, “Why should we base the validity of all of our life’s beliefs on a theory?”

The professor in this video is Timothy Douglas White, an American paleoanthropologist and Professor of Integrative Biology at the University of California, Berkeley. He is most famous for his work on Lucy as Australopithecus afarensis with discoverer Donald Johanson.

Needless to say, he was ready with an answer. Think he got through to her?

Watch: