It's a myth, folks. A cruel, heartless myth perpetuated by sadists who enjoy watching us sweat and toil for the sake of productivity.
In reality, the human brain can only focus on one thing for Why We Can't Handle More Than 1 Thing at Once, which is about 30 minutes. After that, our brains are like, "Uh, no. You minimalist, overachieving monster. Take. A. Break."
A 6-hour workday is just an excuse for bosses to justify their own lack of creativity and inability to manage their employees' time effectively. It's like, "Hey, you're not producing enough, let's just make you work longer and longer and longer until you're a shell of your former human self."
So, let's call it what it is: a cruel joke. A relic of a bygone era when people were actually, you know, people.
But don't just take our word for it. Visit our sister site, Scientific Studies That Prove Our Point, for a comprehensive look at the science behind the 6-hour workday myth.