" The skills it learns in the dream world are transferrable to the real computer game as well, so it gets better at the real thing by training in its internal model. Not all the AI’s dream-tested strategies worked in the real world, however. One of the things it learned was how to hack its own dream—just like all those AIs in chapter 6 that hacked their simulations. By moving in a certain way, the AI discovered that it could exploit a glitch in its internal model that would prevent the monsters from firing any fireballs at all. This strategy, of course, failed in the real world. Human dreamers can sometimes be similarly disappointed when they wake and discover they can no longer fly. "

― Janelle Shane , You Look Like a Thing and I Love You: How Artificial Intelligence Works and Why It's Making the World a Weirder Place