Stress-testing is a thought experiment
An architect finds the cracks in the blueprint before pouring concrete. So do you — with thought, because thought is free and experiments are expensive.
Your job: get your idea to "plausible" before you spend a single real week on it.
Run my stress-test Read `business_model://current` and stress-test it as a thought experiment. For each of the four core dimensions — Clarity, Desirability, Viability, Feasibility — say whether it is plausible and name the single biggest crack. claude mcp add --transport http leanspark https://leanspark.ai/mcp Connect first →
What you get back
Simulates all seven dimensions as a thought experiment and scores each one — flagging which gates are must-pass and exactly where the cracks are — with no market evidence required yet. Your first run is free.
A scored board across the seven dimensions, weak gates flagged, so you know which crack to fix first.
Here’s the analogy to keep for the rest of this book. An architect does not pour concrete to find out if the building stands. They run simulations on the blueprint first — load, wind, stress — and find the cracks while the building is still lines on paper, where a crack costs an eraser instead of a demolition crew.
A business model stress-test is the same move: a thought experiment you run quickly inside the building, on the blueprint, to find and fix the obvious cracks before you spend a single real week. You’re not testing it in the market yet. You’re testing whether it could even hold up in principle.
This isn’t a startup hack — it’s how rigorous thinking works everywhere. You test for plausibility first, with thought, because thought is free and real experiments are expensive. The physicist David Deutsch put it best:
David Deutsch. “The overwhelming majority of theories are rejected because they contain bad explanations, not because they fail experimental tests.” Most bad ideas aren’t killed in the lab — they’re killed because, when you reason through them, the explanation doesn’t hold. That is exactly the move you make with your business model: before spending real weeks gathering evidence, reason through it hard and throw out the versions that contain bad explanations. Cheaply. With thought.
Every business model travels the same lifecycle: idea → plausible → problem evidence → solution demand → product activation → product retention. It starts as an idea — a pure leap of faith. The first move isn’t to gather evidence; it’s to get the idea to plausible — does it hold together as a model at all? That’s the thought-experiment stage. Only then do you spend real time earning the empirical stages, each one costing more than the last.
Most founders skip straight from idea to building, or from idea to interviews — jumping the cheapest, most valuable stage. This runbook does that stage properly: idea → plausible, fast.
Which of the seven would you test first? A full stress-test scores seven dimensions. Four are core — Clarity, Desirability, Viability, Feasibility — the must-pass gates; if one is broken, nothing downstream matters. Three are strategic — Mission, Defensibility, Timing — which sharpen a model that’s already coherent. This runbook runs the four core, in order, because those four are what answer “worth pursuing.” The order isn’t obvious, and getting it wrong wastes weeks.