Apply structured critical thinking — identifying claims, evidence, reasoning chains, hidden assumptions, and logical fallacies — to evaluate or construct specific written arguments rigorously.
SkillScore92Maintained
Automatic
◆Research pack
Last verified 8/28/2026
What it changes
Passed 23 of 25 test cases with the skill, and 12 of 25 without it.
Without skill48%
With skill92%
Checks it passed that the model alone missed
The response uses the exact section heading `## Hidden Assumptions`.
The response uses the exact section heading `## Evidence Assessment`.
The response uses the exact section heading `## Reasoning Evaluation`.
and 9 more in the full report
12 fixed11 passed either way1 still failing1 broke
Pass-rate lift
+44 pp
Tokens
+46%
Agent turns
0%
Response time
-11%
Model gemini-3.6-flashMeasured 8/28/2026v123 of 25 cases passed with skill
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 12 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 12
Prompt
Our VP of Operations sent out a memo arguing that we must mandate five days a week in the office because 'Q4 project completion rates fell by 12% following our hybrid policy launch, and several department heads noted lower team morale.' Can you perform a complete critical thinking analysis of this argument? Please format your response with a clear restatement of the core claim, an evidence assessment table evaluating data quality and relevance, a breakdown of logical validity and any fallacies present, a numbered list of implicit assumptions, and a final verdict detailing the argument's overall strength and how it could be improved.
What was checked, without and with the skill
Checked
Without skill
With skill
The response uses the exact markdown heading `# Argument Analysis:` followed by the topic.
Missed
Passed
The response identifies post hoc reasoning or mistaking correlation for causation regarding the Q4 completion rate drop.
Passed
Passed
The response surfaces the hidden assumption that external non-hybrid factors did not cause the completion rate drop.
Passed
Passed
case-01 · gemini-3.6-flash · 8/28/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md112 lines3 files
Critical Thinking Framework
Overview
Critical thinking systematically evaluates arguments by decomposing them into claims, evidence, reasoning, and assumptions. It identifies where arguments are strong, weak, or fallacious — not to "win" debates but to arrive at better-justified conclusions.
Framework
IRON LAW: Separate the Argument from the Person
Evaluate the ARGUMENT (claim + evidence + reasoning), not the person
making it. A bad person can make a good argument. A trusted expert
can make a bad argument. Ad hominem (attacking the person) and appeal
to authority (trusting the person) are both fallacies.
Argument Structure
Every argument has four components:
Claim: What is being asserted? (conclusion)
Evidence: What facts/data support the claim?
Reasoning: How does the evidence support the claim? (the logical bridge)
Assumptions: What unstated premises must be true for the reasoning to hold?
Evaluation Steps
Step 1: Identify the claim — What exactly is being argued? Restate in one sentence.
Step 2: Examine the evidence
Is it factual or anecdotal?
Is it sufficient (enough data points)?
Is it relevant (does it actually relate to the claim)?