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And in an age when most people squirm if they must sit still to listen to a person speak for longer than a minute, PowerPoint keeps them calm. Its soothing, assuaging underlying message is that there’s no topic too complex, no problem too difficult, no idea too subtle that ordinary human beings can’t grasp it in a 20-minute presentation. PowerPoint runs roughshod over phenomena by flattening them, so that nothing is more important than anything else.