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Inversion

Carl Jacobi / Charlie Munger · 1985

"Solve problems backwards. Ask how to fail, then avoid it."

The idea

Jacobi's advice was 'invert, always invert.' Instead of asking how to succeed, ask how to guarantee failure — then don't do those things. It's often easier to identify what will kill you than what will save you.

Why it works

Inversion works because avoiding stupidity has better odds than seeking brilliance. Human minds are wired to chase positive strategies; failure modes tend to be under-considered. By listing the ways a plan could obviously fail — dependencies, single points of failure, obvious traps — you route around them before starting.

The takeaway — recall it first
Check your understanding

You want to build a lasting friendship. Inversion suggests asking:

Further reading

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The explanation above is written with AI assistance. These are the originals — go to them to check it.

  • Inversion — 'Invert, always invert' (Jacobi / Munger)Charlie Munger / Farnam Street
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