Mr. Downes' major assertions are logically correct and deserve appreciation; however, he runs afoul of his own "Style Over Substance" fallacy in that he routinely sets up specious conservative arguments and points out the logical counter argument. For instance: under his "arguments from ignorance" segment Downes gives the example, "Since scientists cannot prove that global warming will occur, it probably won't". The left routinely uses the argument that since scientists cannot prove that global warming will not occur, then it probably will. It remains that a left wing guy can be right on his major premise, even if he has a fallacious minor premise.
Remember these assertions in discussions with most college professors, news casters, and other feeble minded, but intellectually dishonest liberals.
Click the "Source:" link to get to an interactive site to look at all of the categories and their explainations.
His examples are sometimes crappy, but the categories are fundamentally correct.