Exploring the idea that imagination, as a result of random brain activity, is a sixth sense. It proposes that this "inner ear" of randomness allows us to think creatively and generate new ideas. The author suggests that while our filters naturally suppress this randomness, we can intentionally access and cultivate it through a technique called "subnosis." Subnosis involves focusing on unexpected thoughts and rapidly shifting attention, ultimately leading to a state of heightened imagination. This technique, the text argues, can also be a useful tool for inducing sleep and may even hold the key to developing imaginative artificial intelligence.