Agent skill · Testing & QA

in4-contra-logic

Apply IN4 Contra-Logic to argue the opposite position to stress-test assumptions and expose weak reasoning.

majiayu000github.com/majiayu000GitHub ↗
claude-codeMIT
Install
npx skills add majiayu000/claude-skill-registry --skill in4-contra-logic --agent claude-code

Same command for any agent — swap --agent for codex, cursor, copilot.

Facts
Files in the skill folder: 2
SKILL.md size: 3 KB
Bundled scripts: none
Version: 1.0.0
Path: skills/analysis/in4-contra-logic/SKILL.md
Open the folder on GitHub →
Where it comes from
Stars: 534
Language: HTML

Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.

From the SKILL.md

# IN4 Contra-Logic Apply the IN4 Contra-Logic transformation to argue the opposite position to stress-test assumptions and expose weak reasoning. ## What is IN4? **IN4 (Contra-Logic)** Argue the opposite position to stress-test assumptions and expose weak reasoning. ## When to Use IN4 ### Ideal Situations - Stress-test a plan by reversing assumptions - Identify risks by imagining failure states - Simplify outcomes by removing unnecessary elements ### Trigger Questions - "How can we use Contra-Logic here?" - "What changes if we apply IN4 to this risk assessment for a launch?" - "Which assumptions does IN4 help us surface?" ## The IN4 Process ### Step 1: Define the focus ```typescript // Using IN4 (Contra-Logic) - Establish the focus const focus = "Argue the opposite position to stress-test assumptions and expose weak reasoning"; ``` ### Step 2: Apply the model ```typescript // Using IN4 (Contra-Logic) - Apply the transformation const output = applyModel("IN4", focus); ``` ### Step 3: Synthesize outcomes ```typescript // Using IN4 (Contra-Logic) - Capture insights and decisions const insights = summarize(output); ``` ## Practical Example ```typescript // Using IN4 (Contra-Logic) - Ex

What's inside
Steps it walks through
  1. What is IN4?
  2. When to Use IN4
  3. Ideal Situations
  4. Trigger Questions
  5. The IN4 Process
  6. Step 1: Define the focus
  7. Step 2: Apply the model
  8. Step 3: Synthesize outcomes
  9. Practical Example
  10. Integration with Other Transformations
  11. Implementation Checklist
  12. Common Pitfalls
  13. Best Practices
  14. Measurement and Success
Ships with 1 file
  • metadata.json
Commands it runs
moltbot-registry install hummbl-agent/in4-contra-logic
More from claude-skill-registry
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About this skill
What does the in4-contra-logic skill do?

Apply IN4 Contra-Logic to argue the opposite position to stress-test assumptions and expose weak reasoning.

How do I install it?

Run `npx skills add majiayu000/claude-skill-registry --skill in4-contra-logic --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.

Where does this skill come from?

From majiayu000/claude-skill-registry, a repository with 534 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.

Is a popular skill a good skill?

Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.

Keep going