Market Fit Alpha Blog

Experiments and Evidence

The cheapest test that could prove you wrong, and how to read what it says back.

How to Run a Fake Door Test That Measures Intent, Not Curiosity

A fake door test is the cheapest way to validate an idea before you build it, if you set the threshold first, tell clickers the truth and ask for something that costs them. A worked example with the arithmetic.

Read the case → October 29, 2026 · 6 min

The book

Run the whole loop.

A practical operating system for founders who want evidence before execution: one four-step loop, assumption to experiment to evidence to alpha, run before you build the wrong thing.