But the real argument for the three-day workweek comes when you think of its ability to boost the innovation potential of individuals, companies and even nations. Working fewer hours a week frees up time to take on personal creativity and passion projects. That was the original logic of Google’s 20 percent time, which stipulated loosely that workers should dedicate 20 percent of their workweek to dreaming up new projects and tinkering. Other companies also have experimented with giving workers more time to dream up innovative new products or developing side projects. You can think of corporate hackathons as another way that companies are trying to give workers more time to come up with innovative ideas. Giving workers four days off a week basically eliminates any excuse for not launching that new business or product you’ve been talking about for years.

And, as Slim pointed out, “Having four days [off] would be very important to generate new entertainment activities and other ways of being occupied.” That almost sounds like a throwaway line – isn’t it obvious that if people are only working three days a week, that they will have to fill their time with other activities? On one hand, you can imagine people heading to the beach for a never-ending series of four-day weekends, or using those four days to binge-watch the latest season of “Game of Thrones.” On the other hand, you can imagine people actually creating those new entertainment activities and ways of being occupied.