When you write a speech, you should avoid logical fallacies and other bad arguments. Wikipedia has a page with a long List of Fallacies. Also, last January I blogged about An Infographic Showing Rhetorical Fallacies.
Recently online I found An Illustrated Book of Bad Arguments by Ali Almossawi, which has amusing cartoons about this serious topic.
Five bad arguments came up before the last presidential election, as was discussed by Scott Neuman in A Guide to Spotting Pretzel Logic on the Campaign Trail. Both Barack Obama and Mitt Romney graduated from the Harvard Law School, so their campaigns also should have known better.
In March 2008 Paul Graham posted an essay on How to Disagree that listed a hierarchy which was linked to by the CreateDebate blog and illustrated with a pyramid, as shown above.
The image of two arguing men was derived from an old Federal Art Project poster about More Courtesy.
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