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Your short answer tells founders to design the cheapest test that would move one of them, and this is the clearest write-up of exactly that method. It shows how to isolate the single riskiest assumption behind a disagreement and disprove it with the smallest possible experiment, well before building anything. The Airbnb example makes it concrete and repeatable.
Riskiest Assumption Test
From ModelThinkers by ModelThinkers 10 min read
- Isolate the one assumption whose failure would sink the case
- Test it the cheapest, fastest way that could disprove it
- State up front what result would change your mind
