A launch postmortem needs one falsified belief

Launch retrospectives often become traffic summaries: rank, views, signups, comments. Useful, but none of those says what the team learned.

I think every postmortem should name one belief the launch disproved. Maybe the audience misunderstood the promise, setup friction mattered more than price, or the users who converted were not the segment you expected.

If nothing could have changed your mind, the launch was distribution, not an experiment.

What belief did your last launch force you to update?