Describe your idea, your plan, or the thing you're stuck on, and get back a clear-eyed gut check in the style of a well-known startup thinker. It asks the hard questions most people skip - do people really love this or just say "neat," are you dodging the hard part that's actually the whole opportunity, and what's the smallest scrappy version you could try this week? It'll also sharpen your writing so it reads like a real person wrote it. You get honest, plain-English pushback that helps you think straighter about what to build and where to start.