“Despite the feeling that we’re directly experiencing the world out there, our reality is ultimately built in the dark, in a foreign language of electrochemical signals. The activity churning across vast neural networks gets turned into your story of this, your private experience of the world: the feeling of this book in your hands, the light in the room, the smell of roses, the sound of others speaking. Even more strangely, it’s likely that every brain tells a slightly different narrative. For every situation with multiple witnesses, different brains are having different private subjective experiences. With seven billion human brains wandering the planet (and trillions of animal brains), there’s no single version of reality. Each brain carries its own truth. So what is reality? It’s like a television show that only you can see, and you can’t turn it off. The good news is that it happens to be broadcasting the most interesting show you could ask for: edited, personalized, and presented just for you.”