True or False?. Most PowerPoint presentations are:. compelling illuminating informative clear and to the point. Answer: False. Make a change following the principles of Stephen Kosslyn:. a world authority on the visual brain a clear and engaging writer. Making PowerPoint presentations that are clear, compelling, memorable, and even enjoyable is not an obscure art. In this book, Stephen Kosslyn, a renowned cognitive neuroscientist, presents eight simple principles for constructing a presentation that takes advantage of the information modern science has discovered about perception, memory, and