Individual skill
s4h-logic-check
A fast, comprehensive logic report on any argument, plan, or reasoning — validates premises, tests inference, detects fallacies, surfaces hidden assumptions, and produces a verdict. Lighter than logic-council (no peer review), heavier than logic-argument-validation (covers the whole reasoning, not just one argument). Triggers: 'logic check', 'quick logic review', 'check my reasoning', 'is this sound', 'full logic check', any request for a complete logical assessment.
skills/s4h-logic-check/SKILL.md
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- License
- MIT
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- claude-code Repository topic
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# Logic Check
An argument can fail in three distinct places: a premise can be false, the inference can be invalid (the conclusion doesn't follow even if premises are true), or a hidden assumption can be doing load-bearing work without being examined. Most reasoning errors are invisible because they happen in exactly these places. A complete logic check must test all three.
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## Your Process
**Step 1: Extract the Argument Structure**
Identify the premises (claims taken as given), the inference (how they connect), and the conclusion (what is claimed to follow). Write them out explicitly. Complex reasoning often has multiple linked arguments — map the chain.
**Framing check:** Confirm the argument being examined before continuing. State what you've identified — the actual object being analyzed and the claim at stake — in one sentence, then use `AskUserQuestion`:
- **Question:** "I'm reading this as: [your one-sentence framing of the specific argument and the conclusion it is trying to establish]. Is that right?"
- **Header:** "Framing"