It’s Unpossible 0
At Science 2.0, Patrick Lockerby discusses the closed mind:
He follows with an example of contemporary Christian fundamentalists who claim that plants do not consume carbon dioxide or give off oxygen (and therefore there is not global climate change) because the Bible tells them so.
If you wonder at the wingnut ability to believe stuff that just ain’t true, click to read.
In another real life demonstration of dealing with unpossibility, Andrew Brown responds to a Creationist at the Guardian.