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A daily nudge from the
world's wisest minds

For people who

read a lot but remember little.
Today's Nudge

Charlie Munger borrowed heavily from physics when he insisted on thinking in 'inversions' — instead of asking how to succeed, ask what would guarantee failure, then avoid it. Applied to product decisions: don't ask what features users want. Ask what would make them definitely stop using your product, then make sure none of those are true. Most strategic errors aren't failures of vision; they're failures to clearly see the obvious ways you're losing.

What would make your best customers quietly stop using your product or working with you — and are any of those things quietly happening right now?

Decision TheoryCharlie Munger

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Product Management
Mental Models
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Inversion — Charlie Munger's favorite mental model — transforms how you build product roadmaps. Instead of asking 'what should we build next?', ask 'what would guarantee this product fails?' The features you'd never ship become guard rails. The assumptions you'd never test become your biggest risks. The best PMs don't just prioritize what to do — they systematically eliminate what not to do.

What's one assumption in your current roadmap that you've never tried to disprove?

Decision Theory × Product Strategy

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From the archive

Real nudges, for people who take their thinking seriously

Trusted by founders, operators, and thinkers who've outgrown generic content.

Jain Epistemology (Anekāntavāda tradition)Prabhachandra (Prameyakamalamārtaṇḍa, c. 1040 CE)

When a product team keeps shipping features nobody asked for twice, the instinct is to blame the process — better templates, more rigorous prioritization, cleaner handoffs. But...

In the last two weeks, what question did your team treat as settled that was actually still open — and who, if anyone,...

Read more →

Roman Military Philosophy combined with Naturalistic Decision TheoryPublius Flavius Vegetius Renatus (Epitoma Rei Militaris, c. 390 CE) and Gary Klein (Sources of Power, 1998)

A general preparing for battle doesn't spend the night before rehearsing tactics — he sleeps. This wasn't laziness; it was the culmination of a principle Roman military theorist...

What situation in the next two weeks are you most likely to handle reactively rather than from genuine preparation —...

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Islamic Historical Sociology / Classical PragmatismIbn Khaldun (Muqaddimah, 1377) and Charles Sanders Peirce (The Fixation of Belief, 1877)

When a product or team starts drifting, the instinct is to add — more process, more metrics, more meetings, more roadmap clarity. But the drift is rarely caused by too little...

What is one recurring team ritual or process you have never personally seen evaluated — only inherited?

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Islamic Peripatetic Philosophy (Avicennian psychology)Avicenna (Ibn Sina), Kitab al-Nafs (Book of the Soul), c. 1014–1020, on the estimative faculty (wahm) as a sub-rational meaning-making layer

Every professional in finance develops a private theory of how deals actually close — a working model built from wins, losses, and pattern-matching over years. The problem isn't...

What is a deal, client type, or product category that you instinctively discount before fully examining — and when did...

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Drawing from traditions across the world

StoicismProductivityPsychologyLeadershipHabit ScienceZen BuddhismDecision TheoryManagementIndian PhilosophyAfrican Philosophy

“The unexamined life is not worth living.”

— Socrates

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