Christopher Monckton is a climate denier and a contemptible human being in general. For some time now he has been traveling the globe giving climate presentations that distort the science, misrepresent the positions of scientists and otherwise mislead the public on a serious issue. Fortunately, a professor engineering, John Abraham, put together a devastating critique of Monckton's slideshow, carefully rebutting point by point. Monckton responding in typical fashion, full of bluster and ad hominem attacks, but short on substance. Abraham has in turn replied. I'll leave it to the readers to determine who makes the more convincing case.