I wrote this after noticing how “validation” often turns into collecting supportive anecdotes. The post breaks down 7 common cognitive biases (confirmation, optimism, planning fallacy, sunk cost, survivorship, overconfidence, availability) and a simple anti-bias workflow: fake-door tests, prepayment, a negative-signal checklist, and kill criteria. If you’ve got a validation routine that reliably prevents self-delusion, I’d love to hear it—especially what signals you treat as a hard “no.”