There’s a fundamental question in the debate between natural science and creationism: are creationists who write and distribute their theories allowed to call themselves “scientists”?

On a BBC special from last year, comedian Andrew Maxwell took five British creationists to the West Coast of America to try to convince them that evolution rather than creationism explains how we all got here.

In the clip below, a geologist named Don Prothero is explaining to Phil (an Irish creationist) how the Grand Canyon was formed and the immense amount of time that it took. Phil, eager to pounce on what he perceived as inconsistencies in Don’s remarks, asked if the geologist had ever cared to consider the creationist viewpoint.

Watch Doyle’s response in the video below: