Powerpoint makes you stupid [NYTimes]: The Cognitive Power of powerpoint Presented in the Form of a PowerPoint Presentation
40 words: Displaying greater-than 40 words per slide / complex data dificult in ppt, due to low resolution, while (traditional) slides can be more complex. therefore rate of information transfer lower. "PowerPoint is uniquely suited to our modern age of obfuscation": say nothing, make it look great.
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