Briefle words · Product & specs
Riskiest assumption
The belief that would sink the whole plan if it turned out false, so it should be tested first and as cheaply as possible.
Say it to an AI
Write a one-pager for a pet-sitting marketplace MVP. Start with the riskiest assumption (owners will pay for a stranger), propose a two-week concierge MVP that tests it, give numeric success criteria, and list what's explicitly not in the MVP.
How an expert would brief the stronger version of “Pet-sitting v1 plan”.
See it
Try it as a puzzle →A first-time founder writes the one-pager for what to build first in a local pet-sitting marketplace.
Why: B states it up front: 'Owners will pay $30 for a same-day sitter they have never met.' A never says what it is betting on.
Related words
Room 4 · Requirements & scope
Learn “Riskiest assumption” in a five-minute lesson