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ONE OF SEVEN WAYS OF SEEING

Mental Models

Build a toolkit for understanding how the world works.

2,141 ideas to exploreArranged from A to Z
Mental Modelsbeginner

Practice Simplicity

Break grand visions into smaller, simpler steps to avoid overestimating what you can achieve and move forward with confidence.

business · education↗
Mental Modelsintermediate

Pragmatic Prevention

Charlie Munger praised Lee Kuan Yew as an example of decisive prevention and practical judgment. These remarks connect early intervention, incentives and competence, while also expressing Munger’s controversial political preferences.

politics · business↗
Mental Modelsintermediate

Praising Old Age

Charlie Munger finds humor and reassurance in Cicero’s De Senectute. He values its emphasis on lifelong learning, useful work, and the comfort of remembered good actions, while recognizing that health, poverty, and changing circumstances can make old age difficult.

self-help · philosophy↗
Mental Modelsintermediate

Predicting the Future

Bayesian reasoning, Laplace's Law, and the Copernican Principle help make predictions from limited data. Effective predictions depend on accurate prior beliefs and on understanding the underlying distribution: power-law, normal, or Erlang.

sociology · technology↗
Mental Modelsintermediate

Prediction and Free Will

Taleb argues that models of rational choice make human behavior look more predictable than it is. He connects this critique to free will and the limits of economic forecasting.

economics · statistics↗
Mental Modelsintermediate

Preferential Attachment

Preferential attachment describes a 'rich-get-richer' process where entities with more connections or usage are more likely to gain additional ones, generating power law distributions observed in city sizes, word frequencies, species abundance, and language adoption.

sociology · linguistics↗
Mental Modelsbeginner

Premature Solution Bias

Premature solution bias describes proposing or defending a fix before defining the problem it is meant to solve. It can divert a discussion toward preferred answers while leaving the causes and desired outcome unclear.

philosophy · science↗
Mental Modelsintermediate

Premortem

A premortem asks you to imagine that a plan has failed and identify plausible reasons. Use those reasons to check assumptions and address risks before committing to the plan.

engineering · sociology↗
Mental Modelsintermediate

Prescriptions for Guaranteed Misery in Life

Charlie Munger expands on Johnny Carson's prescriptions for guaranteed misery, adding his own rules for unhappiness including unreliability, not learning from others, giving up after setbacks, and failing to use inversion thinking.

history · science↗
Mental Modelsintermediate

Present Bias and Hyperbolic Discounting

Present bias gives immediate rewards extra weight relative to future benefits. Hyperbolic discounting describes a related pattern: the discount rate declines as the delay grows. Specific commitments and useful defaults can help people follow through on long-term goals.

economics · statistics↗
Mental Modelsintermediate

Presumed Consent

Presumed consent treats eligible people as willing organ donors unless they opt out. Thaler and Sunstein ask how much inaction reveals about a person’s wishes, especially when the default is poorly understood or hard to refuse, and examine the role families play under soft versions of the policy.

ethics · sociology↗
Mental Modelsintermediate

Pretense of Knowledge (Hayek)

Hayek warned that planners can overestimate their knowledge by treating a social system as if all its relevant information were available to them. Knowledge is dispersed among participants, so coordination must draw on information that a central authority may not possess.

politics · sociology↗
Mental Modelsintermediate

Primacy of Definitional Knowledge

The Socratic principle that true knowledge requires understanding the essential definition (Form) of a thing, not merely its observable properties. This approach prioritizes definitional clarity over empirical description and is central to Plato's theory of Forms.

education · philosophy↗
Mental Modelsintermediate

Primes as Random Numbers

Despite being perfectly deterministic, prime numbers behave in many ways as if they were randomly distributed. This heuristic allows mathematicians to make probabilistic predictions about prime gaps, twin primes, and other patterns, which match observed data remarkably well.

science · mathematics↗
Mental Modelsbeginner

Priming

Priming is a cognitive phenomenon where exposure to one stimulus influences the response to a subsequent stimulus, making related concepts more accessible. It demonstrates spreading activation in semantic networks.

psychology↗
Mental Modelsintermediate

Principle of Probabilistic Sustainability

Taleb’s principle evaluates a risk as if it would be repeated at a specified frequency over the unit’s remaining lifespan. With a fixed positive independent ruin probability, cumulative ruin risk approaches 1 as the number of exposures grows without bound; a finite horizon requires its own assessment.

mathematics · economics↗
Mental Modelsintermediate

Private Sector Red Tape

Private companies, hospitals, and universities often have excessive bureaucratic rules and sludge, similar to government agencies. This increases costs and frustrates employees, but alternative approaches like Netflix's 'spend company money as if it were your own' can reduce red tape and improve agility.

business · psychology↗
Mental Modelsintermediate

Privilege

Privilege is analyzed as a hierarchy of intersecting attributes (e.g., rich, white, male), revealing a tension between the number of privilege types a person holds and their absolute societal advantage. This tension helps explain animosity between groups. Discussions of disadvantage need to account for context.

philosophy · politics↗
Mental Modelsintermediate

Probabilistic Forecasting and Uncertainty (Nate Silver)

Nate Silver’s election forecasts expressed uncertainty through probabilities that changed as the evidence changed. Ellenberg uses criticism of those forecasts to explain why an uncertain prediction can be informative, and why a forecaster can expect some errors without knowing which calls will be wrong.

politics · mathematics↗
Mental Modelsintermediate

Probabilistic Thinking

Probabilistic thinking means considering possible outcomes, estimating their likelihoods and weighing their consequences. The theory behind it developed partly from Pascal and Fermat’s 1654 correspondence about gambling. Useful estimates make uncertainty explicit and can be revised as evidence changes.

science · philosophy↗
Mental Modelsintermediate

Probabilities and Number of Possible Outcomes

Estimate probabilities using relevant past data, an explicit model, and the evidence available. Counts alone are not enough unless the outcomes are equally likely. When making a decision, consider both the chance of an outcome and its consequences, including losses you could not recover from. Historical frequencies and expected values are useful guides, but neither guarantees what will happen next.

science · economics↗
Mental Modelsintermediate

Probability

Probability expresses uncertainty about outcomes. Jones emphasizes checking the assumptions behind estimates, combining probabilities with the appropriate rules, and communicating numerical judgments without implying more precision than the evidence supports.

economics · psychology↗
Mental Modelsintermediate

Probability on a Thermometer

The concept critiques the assumption that probabilities of future events can be measured like temperature. It argues that probabilities are often incomputable, especially for rare events with large consequences, and that people do not converge to the same probabilities due to psychological biases and the nature of statistical distributions. This is linked to the concept of Black Swan events and the Fourth Quadrant.

economics · psychology↗
Mental Modelsintermediate

Probability Tree

This excerpt introduces Jones’s probability-tree discussion by explaining why intuitive judgments and vague probability language can mislead. It includes a rain-forecast example, but not the promised exercise or instructions for constructing the tree.

psychology · decision_making↗
Mental Modelsintermediate

Probability vs Expected Value

Expected value combines the probabilities and sizes of outcomes. A high chance of being right can still produce an expected loss when the occasional downside is large.

decision_theory · economics↗
Mental Modelsintermediate

Probability, the Child of Skepticism

Taleb connects probabilistic thinking with skepticism and willingness to revise an opinion. He presents Cicero’s openness to changing his mind as a strength rather than a demand for consistency with every past statement.

history · science↗
Mental Modelsintermediate

Problem Restatement

Restating a problem in more specific terms can generate solution alternatives, whereas very general statements are less likely to suggest answers.

education · business↗
Mental Modelsintermediate

Problem Solving

A problem is a gap between what one has and what one wants. De Bono distinguishes problems needing information, problems needing a new arrangement of existing information, and unnoticed opportunities for improvement. He uses open-ended discussions and closed puzzles to practice different approaches.

science · business↗
Mental Modelsintermediate

Procedural Set Up

Novices may know concepts without connecting them. With experience, they link concepts into sequences that form procedures.

cognitive science · education↗
Mental Modelsintermediate

Proceeding Despite Risk and Uncertainty

People with a cautious ('Blue') mindset perceive risks in nearly every activity, while those with a risk-tolerant ('Red') mindset downplay risks. These views span a spectrum of risk perception. Deciding to proceed requires acknowledging uncertainty.

business · decision-making↗
Mental Modelsbeginner

Process Focus

Focusing on how you perform a task can reduce pressure about results and help you develop skill.

sports · business↗
Mental Modelsbeginner

Process Orientation

Focusing on the process rather than the outcome leads to deeper engagement, present-moment enjoyment, and faster learning.

business · education↗
Mental Modelsbeginner

Process-Focused Satisfaction

True satisfaction comes from giving your absolute best effort, not from achieving a specific outcome. Focus on the process and your level of commitment rather than tying happiness to results.

education · business↗
Mental Modelsintermediate

Procrastination and Self-Control

People often prioritize immediate gratification over long-term goals due to procrastination. Precommitment strategies, such as setting deadlines and bundling unpleasant tasks with rewards, can help overcome this tendency.

business · health↗
Mental Modelsintermediate

Procrustean Bed

The Procrustean bed is a metaphor for distorting reality to fit a fixed model. Taleb uses the myth of a host who stretched or cut travelers to fit his bed to criticize categories and institutions that discard whatever does not fit.

education · sociology↗
Mental Modelsbeginner

Programmed and Voluntary Responses

Automatic responses act quickly with little conscious effort, often drawing on experience. Deliberate processing directs attention to a task and allows you to examine an initial response.

business · education↗
Mental Modelsbeginner

Progress takes the fast track

Cooperation between complementary technologies can let each develop faster. Railroads gave telegraph companies routes and infrastructure, while telegraph communication helped railroads coordinate trains and shipments.

history · sociology↗
Mental Modelsintermediate

Project Portfolio Matrix

A 2x2 matrix to classify projects by cost and time (or other parameters like learning and vision alignment) to maintain an overview and decide which to pursue, delegate, or reject.

business · psychology↗
Mental Modelsintermediate

Project Reporting Blind Spots

A project can spend exactly its monthly budget while falling behind on work. Compare spending with what has actually been delivered, test the assumptions behind benefit forecasts, and hear directly from team members about unresolved risks.

technology · business↗
Mental Modelsintermediate

Prometheus and Epimetheus

Taleb uses Prometheus and Epimetheus to contrast experiments with limited downside and retrospective stories that make events seem predictable. His argument favors keeping useful options open, learning through practice, and checking how much a decision depends on a theory being right.

science · economics↗
Mental Modelsintermediate

Proper Footwork and Natural Movement

The essence of proper footwork lies in moving naturally, treading firmly from heel to toe, and maintaining consistency between everyday movement and combat, avoiding specialized steps that disrupt balance and poise.

philosophy · psychology↗
Mental Modelsintermediate

Prophets and the Present

The classical prophet warns about the present, especially what not to do. Truth-tellers often face persecution, and societies repeatedly ignore warnings despite historical examples of the consequences.

sociology · philosophy↗
Mental Modelsintermediate

Proto-Antifragility

Taleb uses mithridatization and hormesis as limited precursors to antifragility. The first concerns tolerance to particular substances; the second describes cases where a low dose has a beneficial effect while a higher dose harms. The effect depends on the substance, dose and organism, rather than harm being beneficial in general.

medicine · philosophy↗
Mental Modelsintermediate

Proving Yourself Wrong

The story of a journalist who tested her own impression of gender bias in email salutations, found she was wrong, and publicly admitted it, demonstrating the importance of empirically evaluating one's beliefs.

science · sociology↗
Mental Modelsbeginner

Proximate vs. Root Cause

Distinguish the immediate event leading to a problem from deeper conditions that contributed to it. Further questions can uncover additional causes worth investigating.

science · philosophy↗
Mental Modelsintermediate

Psychological Safety

Psychological safety is a climate in which people can raise concerns, ask questions, and admit mistakes without fear of reprisal. Grant describes how this openness can help teams detect problems and learn, while maintaining high standards for their work.

education · sociology↗
Mental Modelsintermediate

Public Opinion Paradox

Public opinion is often incoherent because majority preferences can be contradictory when multiple options exist, challenging the idea that there is a clear public will on many issues.

economics · politics↗
Mental Modelsbeginner

Putting up walls

Walls can restrict movement without ending exchanges of goods, ideas, or customs. Thermodynamic insulation offers an analogy for the effort involved in maintaining separation, but it does not establish that societies must converge or that every barrier will fail.

politics · history↗
Mental Modelsintermediate

Quantification

Quantification uses numbers to compare magnitudes, test assumptions, and work through the consequences of a decision. Estimates and ranges can clarify a problem, but extra decimal places do not make weak assumptions reliable. Hard-to-measure factors still matter.

business · economics↗
Mental Modelsintermediate

Quantifying Your Uncertainty

Quantifying uncertainty means expressing confidence as a probability and checking it against later outcomes. Calibration improves when claims assigned a given confidence level prove correct at roughly that rate over many cases.

statistics · psychology↗
Mental Modelsintermediate

Questioning As We Read

Skilled readers engage in active questioning while reading to deepen understanding, evaluate content, and connect ideas to their lives. The text provides specific questions and a framework based on the elements of reasoning.

education · philosophy↗
Mental Modelsbeginner

Questioning Assumptions

Hidden assumptions can block a solution. In the elevator puzzle, the unexpected explanation depends on which floor buttons the man can reach.

education · psychology↗
Mental Modelsbeginner

Questioning Clarity and Precision

Clear questions guide thinking effectively. Vague or imprecise questions lead to scattered thinking; clarifying a question by breaking it down and adding details helps settle it.

education · philosophy↗
Mental Modelsintermediate

Questioning Concepts

Concepts are mental categories that shape our understanding and expectations. Questioning concepts involves analyzing and clarifying the ideas we use to define situations and events.

education · philosophy↗
Mental Modelsintermediate

Questioning Dogmatic Absolutism and Subjective Relativism

This mental model contrasts dogmatic absolutism (the view that every question has one correct answer) and subjective relativism (the view that no question has correct answers, only opinions), advocating instead for reasoned judgment in questions that require consideration of multiple perspectives and evidence.

education · philosophy↗
Mental Modelsintermediate

Quick or dead: our brains weren’t built for rationality

Duke explains how fast, automatic processing and slower, deliberate reasoning contribute to decisions. Both are useful, but shortcuts can mislead us, and limited attention makes it difficult to check every response. Recognizing a bias alone does not reliably correct it.

evolution · neuroscience↗