Set a question you can't ask out loud. Both people write their honest answer — blind. Then both predict what the other person wrote. The reveal shows four things: what you said, what they said, what you predicted, and what they predicted. The gap between reality and prediction is where the real insight lives. No app download. No login. No subscription. Just a link. Works for any two-person relationship — cofounders, friends, roommates, couples, family.