Read the world’s ideas

When you feel like reading something good.


Which bias is this? · daily quiz

Read a scenario, name the bias fooling you.

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Start from a question you actually have — how to decide, how to think clearly, how to live.

The traps, sorted by situation — the specific biases that hijack a negotiation, a hire, a meeting, an estimate.

The same ideas, re-sorted by what you actually do — the tools a practitioner reasons with, and the biases that trip them up.

Guided journeys — a point of view and an order. Come for one idea, leave having read seven.

Read an idea in two minutes, then read the book behind it.

Melancholy in art
The visual history of ideas

Melancholy

How great artists painted an idea across the centuries — traced through 5 real masterworks.


A fresh stream — ideas, biases and models, plus rooms, masterworks and the books behind them. Two-minute reads, woven so it never feels the same. It remembers where you left off.

Mental model

Second-order thinking

The price cut that wins customers today trains them to wait for discounts tomorrow.

1 min readReviewed May 2026
Cognitive bias

Confirmation bias

Supporting evidence gets waved through; opposing evidence gets cross-examined.

1 min readReviewed May 2026
Mental model

First-principles thinking

Priced as raw cobalt and nickel, the $600 battery pack turned out to be mostly habit.

1 min readReviewed May 2026
Cognitive bias

Availability heuristic

Vivid beats frequent: the plane crash you can picture outweighs the drive that's deadlier per mile.

1 min readReviewed May 2026
Visual history · 5 works

Melancholy

The visual history of melancholy

School of thought

Stoicism

Your judgements are up to you; almost everything else never was.

1 min readReviewed May 2026
Mental model

Inversion

List every way to wreck a career; avoiding them beats any positive plan.

1 min readReviewed May 2026
Cognitive bias

Loss aversion

Holding the losing stock doesn't undo the loss; it only delays admitting it.

1 min readReviewed May 2026
Mental model

Margin of safety

The bridge rated for 10-ton trucks is built to hold 30 — nobody trusts the estimate to be exact.

1 min readReviewed May 2026
Cognitive bias

Anchoring bias

Even a number you know is irrelevant drags your estimate toward it.

1 min readReviewed May 2026
Free on Audible
The book behind the ideas

Thinking, Fast and Slow

by Daniel Kahneman — The definitive account of how the mind decides — and misfires.

Idea

The Allegory of the Cave

Freed from the cave, the prisoner climbs to the light — and the others reject what he brings back.

1 min readReviewed May 2026
Mental model

The map is not the territory

Optimise the metric hard enough and the thing it stood for quietly collapses.

1 min readReviewed May 2026
Cognitive bias

Sunk-cost fallacy

Walk out or sit through the bad film — the ticket money is gone either way.

1 min readReviewed May 2026