ClaudSkills / Science & Research / research-methods

Critical Thinking

Q: What is a Claude Code skill and how does the Critical Thinking 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. Critical Thinking is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Science & Research category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Science & Research · Sub-category: research-methods · Last updated: 2026-05-21

Critical thinking as philosophical practice. Covers the Socratic method (elenchus), argument identification and reconstruction, premise evaluation, fallacy detection (formal and informal), charitable interpretation (principle of charity), dialectical thinking (thesis-antithesis-synthesis), thought experiment methodology, philosophical writing and reading, intellectual virtues (humility, courage, empathy, honesty), Dewey's reflective thinking, and critical thinking applied to everyday reasoning. Use when analyzing arguments, practicing Socratic questioning, evaluating reasoning, or developing philosophical method.

About this skill (catalog notes)

Critical Thinking includes explicit scope boundaries (an explicit 'when not to use' or 'out of scope' section); pricing or quota commentary. At roughly 4,300 words the SKILL.md is on the longer end of the catalog distribution.

Original author: fabioc-aloha
Indexed lastmod: 2026-05-21
Catalog position: Science & Research · research-methods
Indexed related skills: 10

How Critical Thinking fits the catalog

Critical Thinking sits in the Science & Research category under the research-methods 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

Critical thinking is philosophy's most exportable skill — the capacity to evaluate reasoning, detect errors, reconstruct arguments charitably, and think clearly under uncertainty. It is not a body of knowledge but a practice: something you do, not something you know. This skill covers the methods, virtues, and habits that make philosophical thinking rigorous and transferable to any domain.

What this skill does

Critical Thinking is a community-contributed Claude Code skill in the research-methods sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/critical-thinking/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when analyzing arguments, practicing Socratic questioning, evaluating reasoning, or developing philosophical method.

Who uses this skill

The Critical Thinking Claude Code skill is built for researchers, data scientists, academics, and analysts working with complex data and scientific literature. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 116,000+ 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/critical-thinking
curl -L https://claudskills.com/skills/critical-thinking/SKILL.md \
  -o ~/.claude/skills/critical-thinking/SKILL.md

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

Skills live at ~/.claude/skills/critical-thinking/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\critical-thinking\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 Critical Thinking Claude Code skill?

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

What does the Critical Thinking 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 Critical Thinking skill?

Use Critical Thinking when your Claude Code task falls under the Science & Research category — specifically in the research methods 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 Critical Thinking" or describe the task and let Claude pick). Browse related skills at /category/science/.

What is a Claude Code skill and how does the Critical Thinking 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. Critical Thinking is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Science & Research category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/fabioc-aloha/Alex_ACT_Edition/blob/HEAD/.github/skills/critical-thinking/SKILL.md
Author: fabioc-aloha

Cite this skill

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

APA

fabioc-aloha. (2026). Critical Thinking [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/critical-thinking/

BibTeX

@misc{critical-thinking-2026,
  author    = {fabioc-aloha},
  title     = {Critical Thinking [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/critical-thinking/}
}

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