Deep-Dive Dossiers

Mental Models

Magazine-length dossiers that dissect one mental model at a time — the hidden architectures behind decisions that compound. Each issue is built from primary sources and real operator evidence.

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Mental Model No. 001

The Inversion Stack

“Invert, always invert.”

In the winter of 1943, Charlie Munger sat in a cramped meteorological station in Nome, Alaska, running weather calculations for the U.S. Army Air Corps. He was twenty years old, recently dropped out of the University of Michigan, and far from the investment career that would eventually make him a billionaire. But during those long Arctic nights, Munger encountered a mathematical principle that would become the backbone of his entire analytical framework — and the most practical thinking tool in his arsenal.

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Strategy & Decision · No. 001

The Inversion Stack

Four Backward Moves That Solve What Forward Thinking Cannot

“

Invert, always invert.

— Carl Gustav Jacob Jacobi

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25 minutes

Economics & Markets · No. 002

The Incentive Audit

Diagnosis by Dollar Sign

“

Show me the incentive and I will show you the outcome.

— Charlie Munger

A surgeon in Lincoln, Nebraska spent years removing healthy gallbladders from patients who needed no surgery. He was paid per procedure. He believed he was being thorough. The incentive had rewritten his clinical judgment so completely that he could not see the corruption from the inside. This is the Incentive Audit: a four-mode diagnostic for identifying the hidden reward structures that explain behavior no amount of talent, ethics, or intelligence can override.

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30 minutes

Strategy & Decision · No. 003

The Moat Audit

Four Structural Tests That Separate Real Defensibility from the Story You Tell Investors

“

In business, I look for economic castles protected by unbreachable moats.

— Warren Buffett

A company called Castronics threads pipe. The entire business. Forty-five dollars of carved grooves on a $3,000 steel section, performed in a location where failure means six figures of idle labor and no replacement within a hundred miles. Nobody switches vendors to save ten dollars. The ratio is the moat. Not the technology, not the brand, not the patent portfolio. This model delivers four structural tests that expose whether a business is actually defended or merely telling a good story about defensibility.

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35 minutes

Strategy & Decision · No. 004

The Constraint Crusher

Four Operations for Turning Limitations into Advantage, Scarcity into Signal, and Dead Rules into Open Field

“

The enemy of art is the absence of limitations.

— Orson Welles

In 1985, Thomas Peterffy needed to get real-time pricing data to his traders on the New York Stock Exchange options floor. He had built software that could calculate bid-ask quotes faster than any human, but the exchange banned electronic devices in the trading pit. That weekend, at his house in upstate New York, Peterffy sat alone at his kitchen table, staring into a mug of colored pencils. He picked one up, turned it in his fingers, and set it back down. Then he built a system where each color represented a specific price range — and Interactive Brokers became the most profitable market-making operation on the floor within months.

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30 minutes