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deductive-reasoning

Decompose legal case materials into premises, facts, and conclusions.

Updated Mar 29, 2026
Search Tags:#legal reasoning#case analysis#fallacy detection#syllogism#deductive logic#premise extraction
One-click install
npx skills add https://github.com/zizhenchen47-oss/claude-skills --skill deductive-reasoning-zizhenchen47-oss
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: deductive-reasoning
Source: https://github.com/zizhenchen47-oss/claude-skills/tree/main/deductive-reasoning
Command: npx skills add https://github.com/zizhenchen47-oss/claude-skills --skill deductive-reasoning-zizhenchen47-oss

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Helps you turn messy case facts, statutes, and conclusions into a clear logical chain so you can test whether a legal argument is valid.

Core Features & Use Cases

  • Premise extraction: Separate major premise, factual minor premise, legal minor premise, and conclusions from case materials.
  • Middle-term tracing: Link raw facts to legal facts and legal facts to governing rules.
  • Validity review: Check for affirming the consequent, denying the antecedent, and four-term fallacies.
  • Use case: Review a dispute memo, identify intermediate conclusions, and explain whether each step in the legal argument is formally valid.

Quick Start

Provide the case facts, claimed conclusion, and any statutes or rules, and ask the skill to map them into a P-F-C reasoning chain and assess the argument’s formal validity.

Frequently Asked Questions about deductive-reasoning

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I extract premises and conclusions from messy case facts for legal reasoning?▼

Legal reasoning requires separating major premises, factual minor premises, legal minor premises, and conclusions from case materials, then mapping them into a verifiable premise-fact-conclusion chain to test formal argument validity.

How can I check if a legal argument is formally valid or contains fallacies?▼

Validity checking reviews the extracted legal reasoning chain to detect affirming the consequent, denying the antecedent, and four-term fallacies, explaining whether each intermediate step in the legal argument is formally valid.

What is a P-F-C reasoning chain in legal case analysis?▼

A P-F-C reasoning chain is a verifiable premise-fact-conclusion structure used in legal case analysis, requiring explicit identification of the major premise, minor premise, conclusion, middle term, and fallacy types to assess formal validity.

Does legal syllogism extraction work for analyzing dispute memos and intermediate conclusions?▼

Legal syllogism extraction applies to dispute memo analysis by reviewing the materials, identifying intermediate conclusions, and mapping facts to statutes to explain whether each step in the legal argument is formally valid.

What do I need to provide to map case facts into a deductive logic chain?▼

To map case facts into a deductive logic chain, you must provide case facts, claimed conclusions, and any statutes or rules, allowing the skill to extract premises and assess the formal validity of the legal argument.

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