Mental models are named patterns in how people think, decide, and get fooled. Each card names one. Turn it over and there is an exercise you can finish in two minutes — take a card, try the prompt, then use it on something real this week.
The card faces and definitions are from our printed deck, unchanged. Four cards are blank in the print run — those models were written for the web and say so. Every exercise is new.
Take one off the top
A random mental model with a guided exercise.
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Action Step
The Full Deck
Flip any card. The back tells you what to do.
Everything in the deck.