Here's a wonderful, short didactic comic on recent social and political science-denial movements, by Darryl Cunningham. It's short and pithy, one of the best examples of clear thinking I've seen. All the better that it's in a visual medium like comics; I hope it gets wide distribution. You should read the whole thing!
And while you're at it, don't miss his piece on homeopathy!
Tips of the hat to Tom Spurgeon and Gary Randolph.