At 27:50, he relays a story about a grad student who did an experiment to see what the audience retained better: the slides, or the presenter's words. It seems

At 27:50, he relays a story about a grad student who did an experiment to see what the audience retained better: the slides, or the presenter's words. It seems the slides won out. So apparently the slides are the star of the show, whether you like it or not.