The harshest feedback you'll get without talking to a VC. Validates ideas before you waste months.
I want you to brutally critique my business idea. Don't be nice. Be the most skeptical, experienced investor in the room. Business idea: [DESCRIBE YOUR IDEA] Attack it from every angle: 1. **Market size reality check** — Is the TAM actually big enough? Are the numbers real or made up? 2. **Competition** — Who already does this? Why haven't they dominated? Why will you win? 3. **Unit economics** — How does money actually flow? What are CAC, LTV, payback period? 4. **Founder-market fit** — Why YOU? What's your unfair advantage? 5. **What has to go right** — List every assumption that needs to be true simultaneously 6. **The fatal flaw** — What's the one thing that could kill this that you're probably ignoring? 7. **The charitable read** — If this works, why does it work? Score it 1-10 and tell me if you'd fund it.