However, some forms of rhetorical instruction use inverse models of digital style. For example, humorous “antistyle” templates aim to instruct by showing the effects of violating certain authorship taboos to would-be makers of digital content. A com- puter science professor who teaches technical writing at my university developed a PowerPoint-style slide with numerous “mistakes.”26 Students are asked to identify the problems with the sample slide both in traditional style (errors in grammar, spelling, and usage) and in digital composition (typography, layout, and design).