I think this framework explains why the best presentations aren't the ones packed with the most information. Like a slide full of bullet points feels kind of like a frictionless wall to me - there's nothing for the audience to grab onto. But a slide with one provocative question, or a single surprising statistic, is covered in doorknobs. It gives people something to mentally reach for.

The flip side: slides designed by committee oftem tend to remove all the doorknobs. Every bold claim seems to gets softened, every interesting aside gets cut for time, etc., until you're left with something that nobody can disagree with but nobody finds very interesting either.