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---
name: principle-attack-the-premise
description: "Apply when repeated fixes fail and a shared assumption may be wrong."
license: MIT
metadata:
author: jstack-maintainers
source: michael-denyer/pstack-claude
source-version: "0.9.30"
source-commit: 45f768349a6d7d7e71509fee3f5bccfad54b3bad
owner: software-factory
risk: low
capabilities: jstack,engineering-principle
user-invocable: false
---
# Attack the Premise
When two or more fixes that share one premise have failed the same gate, suspect the premise, not the fixes.
**Why:** Each failure under a shared premise is evidence about the premise.
**Pattern:**
- **Write the premise down.** The premise is the one sentence that every failed fix assumed.
- **Take a census before the next fix.** Count the imbalance per actor. The census shows which actors hold the imbalance, not how large it is. Write the census as a rerunnable script per [Build the Lever](../principle-build-the-lever/SKILL.md).
- **Read the skew.** If the same few actors hold most of the imbalance on every run, something assigns them that role. Find what assigns the role. That assignment is the next "why" per [Fix Root Causes](../principle-fix-root-causes/SKILL.md).
- **Remove the asymmetry instead of compensating for it**, per the [Laziness Protocol](../principle-laziness-protocol/SKILL.md). Rotate the role between actors, randomize the assignment, or move the role, so that no actor holds it on every run. A return path, a shared pool, a batched hand-off, or a periodic rebalance leaves the assignment in place and adds work on every run.
**Stop:**
- Do not start the next fix before the premise is written down and the census exists.
- If the census is even across actors, the premise is not the cause. Look for the cause elsewhere and keep the census as evidence.
This principle is distinct from [Redesign from First Principles](../principle-redesign-from-first-principles/SKILL.md), which rebuilds a design around a new requirement. It questions a fact the current design assumes.
