Making things is a circle. You start the arc with an idea about the world: an observation or hunch. Then you sprint around the track, getting to a prototype—a breadboard, a rough draft, a run-through—as fast as you can. Your goal isn’t to finish the thing. It’s to expose it, no matter how rough or ragged, to the real world. You do that, and you learn: Which of your ideas were right? Which were wrong? What surprised you? What did other people think? Then you plow those findings back into an improved prototype. Around the circle again. Run!