“You know how you’re at a party and you pick up the wrong beer, and you know after one sip that it’s not yours? But then, when you find the right one, you know it right away? Why? What is it? The temperature, or the taste of your own spit that you somehow recognize? Or the weight and moistness of the can? Or maybe everything, all together. But it’s all so subtle and complex you can’t explain it. If someone asked, How do you know that’s your beer? well, you wouldn’t know what to say. You just know.”