Logical Reasoning

Q: What is a Claude Code skill and how does the Logical Reasoning skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Logical Reasoning is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: General · Sub-category: general-misc · Last updated: 2026-05-21

Deductive and inductive reasoning, formal and informal logical structure, validity, soundness, and rules of inference. Covers propositional logic, quantified reasoning, syllogisms, common inference patterns (modus ponens, modus tollens, hypothetical syllogism, disjunctive syllogism), and the distinction between deductive certainty and inductive probability. Use when the question is not whether a premise is true but whether the reasoning from premises to conclusion is logically valid.

Security AStatic scan found no risk patternsHow grading works ›

About this skill (catalog notes)

Logical Reasoning includes explicit scope boundaries (an explicit 'when not to use' or 'out of scope' section); 14 code blocks for direct copy-paste. At roughly 2,153 words the SKILL.md is on the longer end of the catalog distribution.

Indexed lastmod: 2026-05-21
Catalog position: General · general-misc
Indexed related skills: 10

How Logical Reasoning fits the catalog

Logical Reasoning sits in the General category under the general-misc sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

From the source SKILL.md

Logic is the study of what follows from what. A valid logical argument has a form that preserves truth — if the premises are true, the conclusion cannot be false. This skill covers the core machinery of deductive and inductive reasoning: the rules of inference, the standard argument forms, the common errors, and the boundary between the two styles of reasoning.

What this skill does

Logical Reasoning is a community-contributed Claude Code skill in the general-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/logical-reasoning/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when the question is not whether a premise is true but whether the reasoning from premises to conclusion is logically valid.

Who uses this skill

The Logical Reasoning Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 146,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/logical-reasoning
curl -L https://claudskills.com/skills/logical-reasoning/SKILL.md \
  -o ~/.claude/skills/logical-reasoning/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/logical-reasoning/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/logical-reasoning/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\logical-reasoning\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Logical Reasoning Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/logical-reasoning/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Logical Reasoning skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Logical Reasoning skill?

Use Logical Reasoning when your Claude Code task falls under the General category — specifically in the general misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Logical Reasoning" or describe the task and let Claude pick). Browse related skills at /category/general/.

What is a Claude Code skill and how does the Logical Reasoning skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Logical Reasoning is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at /learn/what-is-a-claude-skill/.

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

ClaudSkills. (2026). Logical Reasoning [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/logical-reasoning/

BibTeX

@misc{logical-reasoning-2026,
  author    = {ClaudSkills},
  title     = {Logical Reasoning [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/logical-reasoning/}
}

Embed this skill

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Badge

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Security scan

Grade A · scanned 2026-07-06 — free static scan against the OWASP Agentic Skills Top 10.

No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›

✓ Prompt injection
✓ Data exfiltration
✓ Supply chain
✓ Reverse shell
✓ Credentials
✓ Execution
✓ Filesystem
✓ Persistence
✓ Obfuscation
✓ Network

Show this grade on your repo (click to copy):

[![Security: A](https://img.shields.io/badge/Security-A-2e7d32)](https://claudskills.com/skills/logical-reasoning/#security)

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Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills. · What's New · Install guide · About · llms.txt

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