While updating my list of wild Earth theories, I thought it might be a good idea to summarize the things that always tell me I'm dealing with geological pseudoscience. They include things like bogus appeals to authority and open-mindedness, inadequate knowledge of the field and a heated denial of proven facts. One thing I didn't include, and maybe I should, is the notion that the truth is simple. But the drive for simplicity is an essential ingredient of successful science. If we didn't have the conviction that the natural world can be analyzed and modeled by comprehensible principles and laws, progress would be slow and accidental instead of swift and purposeful. Where science and pseudoscience part, though, is in the last three words of Einstein's quote that theories should be as simple as possible, but no simpler.