Errors vs. Rhetorical Devices

Is there a difference between writing errors and employing rhetorical devices? This presentation argues that there is a difference, but it might be a finer point than one would think. Addressing double entendre, oxymorons, and parody, among others, against their counterpoints (ambiguity, contradiction, imitation), the slide show is entertaining for grammarians and wordsmiths alike. Your class will appreciate the examples of each device throughout the presentation.