Critical Thinking

Smart isn't the same as right.
Learn to reason like a scientist.

12 lessons on logic, fallacies, and evidence — the reasoning traps that catch smart people hardest.

💭 Honest take

12 lessons, roughly 90 minutes total. It won't make you a logician — but it will put names on the reasoning traps you fall for most, and the Psychology course builds directly on it.

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✓Break any argument into claims, premises, and hidden assumptions

✓Spot the fallacies and rhetorical traps you meet most often

✓Judge evidence quality — studies, statistics, anecdotes, experts

✓Calibrate your confidence to what the evidence actually supports

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What an Argument Actually Is

Most disagreements aren't arguments — they're assertions taking turns — Beginner

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Curated paths through the course — pick one and finish it, instead of scrolling a thousand lessons.

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What an Argument Actually Is

Most disagreements aren't arguments — they're assertions taking turns

Beginner

Not All Evidence Is Equal

A hierarchy that resolves most 'but I read a study' arguments

Beginner

Attacking the Person Instead of the Argument

Even someone you despise can be right

Beginner

Steelmanning: Argue Against the Best Version

If you can only beat the dumb version, you haven't won anything

Beginner

False Dilemmas and Slippery Slopes

Two of the most common ways an argument smuggles in a hidden assumption

Intermediate

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Intermediate

Why Most Published Findings Might Be False

Science self-corrects — but the correction takes decades

Intermediate

The Burden of Proof Is Not Symmetric

'Prove it isn't true' is not a real challenge

Intermediate

Sources, Consensus, and When to Trust Experts

You can't verify everything yourself — so verify the process instead

Intermediate

Survivorship Bias: The Data You Never See

The most dangerous evidence is the evidence that isn't there

Advanced

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Advanced

Bayesian Thinking: Update, Don't Flip

Beliefs should have dials, not switches

Advanced

Building a Calibrated Mind

The goal isn't being right — it's knowing how right you probably are

Advanced

Motivated Reasoning: Smart People Fool Themselves Better

Intelligence doesn't protect you — it gives you better tools to rationalize

Smart isn't the same as right.Learn to reason like a scientist.

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Smart isn't the same as right.
Learn to reason like a scientist.