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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 Modelsintermediate

Experiential Evidence

Experiential evidence is a meta-category of evidence that is less objective than empirical evidence, encompassing suggestions from commonly accepted standards, norms, and the opinions of qualified experts.

science · philosophy↗
Mental Modelsintermediate

Expert Evidence

Anecdotes and professional experience can suggest useful questions without showing how representative a case is. Structured consultation with several experts, such as the Delphi method, can expose differences in judgment, but the quality of the result still depends on the evidence and the panel.

science · business↗
Mental Modelsintermediate

Expert Intuition: When Can We Trust It?

These notes to Kahneman’s chapter on expert intuition include the Getty kouros example and references on intuition as recognition. They raise a question about whether a strong expert hunch is reliable, without supplying the chapter’s full argument.

art · business↗
Mental Modelsintermediate

Experts and "Empty Suits"

Experts cannot predict rare, high-impact events (Black Swans) but act as if they can, leading to massive forecast errors. The solution is to focus on tinkering and maximizing exposure to positive Black Swans rather than naive prediction.

economics · psychology↗

Experts vs. Imitators

Parrish suggests asking a claimed expert to explain details in plain language, handle unfamiliar cases, describe failures and identify the limits of their knowledge. Fluent delivery alone does not establish understanding.

education · business↗

Explicit Memory

Explicit memory involves conscious, intentional recall of information, including personal experiences (episodic) and factual knowledge (semantic).

psychology↗
Mental Modelsintermediate

Exploiting Assumptions

Rethinking the equilibrium or exploiting the assumptions that others rely on can provide a competitive advantage. By shifting away from expected patterns, you can make yourself unpredictable and resilient.

business · psychology↗
Mental Modelsintermediate

Explore/Exploit

Exploration means trying options to learn about them; exploitation means choosing what seems best from the evidence already available. The balance depends on the cost of experimenting, the uncertainty about alternatives, and how many future decisions could benefit from what you learn.

technology · economics↗
Mental Modelsintermediate

Explore/Exploit Tradeoff

The explore/exploit tradeoff describes the balance between trying new things (exploration) to gather information and sticking with known good options (exploitation) to maximize reward. Formalized as the multi-armed bandit problem, it applies to decisions in everyday life, technology, medicine, and more, with optimal strategies depending on one's time horizon.

computer science · technology↗
Mental Modelsintermediate

Exponential Backoff

Exponential backoff increases the waiting interval after repeated failures, often by doubling it and choosing a random delay within the interval. It reduces repeated contention and retry traffic. Whether attempts eventually stop is a separate policy; applications to perseverance or forgiveness are analogies rather than consequences of the algorithm.

technology · psychology↗
Mental Modelsintermediate

Exponential Successful

Methods that worked in the past may become less useful as conditions change. Reassess their assumptions and consider alternatives alongside the approaches you retain.

business · psychology↗
Mental Modelsintermediate

Extension of the Body

Musashi urges a fighter to coordinate the whole body in an attack, using the sword as an extension of the body and committing fully to the movement.

philosophy · psychology↗
Mental Modelsintermediate

External Factor Fallacy

Paterson advises investigators to keep asking questions after identifying an external factor. Review how the organization assessed a dependency, assigned responsibility, monitored performance, and prepared for a failure.

management · business↗
Mental Modelsintermediate

External Factors Are Not Root Causes

When an external event contributes to a problem, root cause analysis should also examine how the organization anticipated and responded to it. Supplier oversight, changing circumstances and dependence on consultants can reveal weaknesses that the organization can address.

management · psychology↗
Mental Modelsintermediate

External Factors Are Not the Root Cause of Problems

When an external event causes a problem, also examine the vulnerability that allowed it to do so. Root-cause analysis can identify reasonable precautions, contingency plans, or changes in goals without assuming that every external threat was foreseeable or preventable.

risk_management · economics↗
Mental Modelsintermediate

External Forces

Organizations face external pressures from market demand, politics and law, social and ethical expectations, technology, and competitors. Banasiewicz examines how shared purpose, organizational memory, and limits on information processing shape their responses.

psychology · sociology↗
Mental Modelsintermediate

Extraordinary Religious Claims

Skepticism should not halt at religion's front door; it is appropriate and vital for religious people to apply critical thinking to avoid scams, bad beliefs, and to identify pseudoscientific claims within their faith.

philosophy · science↗

Extremistan

Extremistan is Taleb’s name for domains where a single extreme observation can dominate a total, such as wealth, book sales, or citations. Averages and ordinary fluctuations may then give a poor picture of concentration and risk.

sociology · philosophy↗
Mental Modelsintermediate

Extremistan and Mediocristan

Taleb uses Mediocristan for quantities whose extremes have limited influence on the total, and Extremistan for quantities where a single observation can dominate it. In Extremistan, a sample average may change sharply when a rare extreme value appears.

science · economics↗

Extremistan vs Mediocristan

Taleb contrasts Mediocristan, where individual observations have limited influence on a large aggregate, with Extremistan, where rare extreme observations can dominate it. The distinction asks how much an average can conceal and whether a thin-tailed model fits the quantity being studied.

economics · statistics↗

Eye on the Prize

Prioritize long-term direction over short-term speed by making decisions that increase your velocity toward your ultimate goal, as exemplified by Mae West's career strategy.

business · psychology↗
Mental Modelsintermediate

F*** You Money

Having enough savings to act independently without financial pressure, allowing one to choose work based on passion rather than necessity. It frees you from outside authority and prostituting your mind.

business · economics↗
Mental Modelsintermediate

Facta non Verba (Deeds Before Words)

Taleb argues that demonstrated capability can influence an opponent more strongly than verbal threats. He develops the argument through a fictional Mafia warning, legends about the Assassins, and his own accounts of photographing abusive strangers. He also argues that public web-shaming carries risks beyond the immediate confrontation.

politics · sociology↗

Fall in Love With the Process

Build a learning process that includes manageable attempts, feedback, and revision. Fear of failure need not stop disciplined practice, but mistakes help only when you examine them and change your approach.

business · education↗
Mental Modelsintermediate

False Positives and False Negatives

A mental model that examines decisions through the lens of false positives (undeserved outcomes) and false negatives (missed deserved outcomes). By abstracting arguments to these two types of errors, it clarifies disagreements in areas such as social policy, personal risk-taking, and even jetlag management.

politics · economics↗
Mental Modelsintermediate

Falsifiability

The principle that a scientific theory must be able to be proven wrong by conceivable observations; if it cannot be falsified, it is not empirical science.

science · philosophy↗

Fantasy and Fiction Are Okay

Skepticism does not require rejecting fiction; it only warns against confusing fiction with reality. Fantasy and storytelling are valuable for creativity, learning, and emotional experience, as long as the boundary between the imagined and the real is maintained.

education · philosophy↗
Mental Modelsintermediate

Faster Is Slower

Growth that outruns a system’s capacity can trigger delays and setbacks. Senge argues for a sustainable pace rather than assuming the fastest possible growth will produce the best long-term result.

ecology · systems theory↗
Mental Modelsintermediate

Fat Tony

Fat Tony is a character embodying practical, street-smart thinking that relies on experiential knowledge and skepticism of theoretical models, often used to contrast with nerdy, academic reasoning.

business · economics↗
Mental Modelsintermediate

Fat Tony versus Socrates

A thought experiment contrasting the practical, instinct-driven approach of Fat Tony with Socrates' demand for explicit definitions, arguing that tacit knowledge is valuable and over-questioning can undermine intuitive competence.

business · philosophy↗

Feedback Analysis

A technique to identify your strengths and areas for improvement by writing down expected outcomes of important decisions and comparing them with actual results after a year.

business · education↗
Mental Modelsintermediate

Feedback and Practice

Intuitive expertise develops through practice in a sufficiently regular environment with clear, timely feedback. A professional may acquire reliable intuition for some tasks while remaining poor at others whose outcomes are delayed or ambiguous.

medicine · business↗
Mental Modelsintermediate

Feedback Loops

Feedback loops are processes where a system's output also acts as input, either balancing toward equilibrium or reinforcing change. Understanding them improves decision-making, communication, and adapting to feedback in personal and professional life.

engineering · systems thinking↗

Feeling and Reason

The passage contrasts a quick emotional reaction with deliberate reasoning that considers longer-term consequences.

neuroscience · behavioral economics↗
Mental Modelsintermediate

Female Differentiation Strategies

This classification groups styles of self-presentation under labels for embracing or rejecting conventional femininity. The labels are interpretive categories, not an established explanation of women’s motives.

sociology · psychology↗
Mental Modelsintermediate

Female Sexual Strategy Archetypes

An opinionated taxonomy that interprets women’s dating behavior through market concepts such as beauty, scarcity, investment, and expectations of a partner. Its Ultra-Girl and Anti-Girl archetypes can overlap or change over time; the categories express the author’s reading of behavior and motives.

sociology · psychology↗
Mental Modelsintermediate

Feynman Diagrams

Feynman diagrams represent terms in calculations of particle interactions. Their lines and vertices make relationships easier to organize, illustrating how a useful representation can support both reasoning and communication.

education · data visualization↗

Feynman Technique

The Feynman Technique is a learning method that emphasizes teaching an idea to deepen understanding, involving four steps: study, teach, identify gaps, and simplify.

science · education↗

Feynman Technique for All Domains

The habits associated with the Feynman Technique—asking questions and explaining ideas clearly—can be useful beyond physics. Hollins uses Feynman’s interest in drawing and scientists’ reflections on awe to explore that possibility.

education · science↗

Feynman’s Advice: Play More!

Richard Feynman's approach to learning and discovery emphasizes playful curiosity and relaxation, contrasting with intense work. He argues that serious play—focusing on interesting problems without worrying about importance—can lead to breakthrough insights.

science · business↗

Fight or Flight

The fight or flight response is a physiological reaction to perceived threats, preparing the body to either confront or flee from danger. This concept can be applied to everyday challenges such as deadlines or interpersonal stress, and can be managed through techniques like deep breathing.

self-help · psychology↗
Mental Modelsintermediate

Filtering Methods

Taleb compares separating market information from noise with filtering static from a telephone signal. The analogy highlights the risk of treating fluctuations as meaningful changes.

engineering · science↗
Mental Modelsintermediate

Finding Axioms

Comparing beliefs across different situations can reveal a shared underlying principle. Cheng uses analogies to identify her preference for preventing false negatives over false positives, then examines how that preference shapes her views.

philosophy · psychology↗

Finding Quality Inputs

A repeatable testing process lets you compare candidate inputs and refine them from the results. It can organize a search even when you do not know which inputs will work.

medicine · science↗
Mental Modelsintermediate

Finding the Sweet Spot of Confidence

Grant uses reported cases of Anton’s syndrome, in which people do not recognize their blindness, as an analogy for unnoticed limits in knowledge and judgment. Recognizing those limits makes it possible to seek feedback and revise a confident view.

medicine · philosophy↗
Mental Modelsintermediate

First Follower Effect

An idea’s success depends partly on who adopts, supports, and develops it. Early followers can help an invention spread, while later popularizers may receive more credit than earlier contributors. Adoption and recognition do not by themselves establish originality.

technology · history↗
Mental Modelsintermediate

First Principle

First-principles thinking examines the facts, constraints, and starting assumptions behind a problem, then builds an approach from those foundations.

technology · science↗

First Principles Reasoning

Separate what you know about a problem from what you assume, then work from those foundations toward your goal. The author illustrates the approach by examining fears about leaving a job.

science · business↗
Mental Modelsintermediate

First- and Second-Order Thinking

First-order thinking makes snap decisions that fix short-term problems but often create long-term issues, while second-order thinking considers far-reaching consequences to choose the best overall solution.

decision-making · personal finance↗
Mental Modelsintermediate

First-Principles Thinking

First-principles thinking involves breaking down complex problems into their fundamental truths or basic components and rebuilding solutions from there, rather than relying on analogy or existing conventions.

technology · science↗
Mental Modelsintermediate

First, Do No Harm (Iatrogenics)

The principle of 'first do no harm' (primum non nocere) from medicine is applied to other domains, highlighting that interventions can cause unintended harmful side effects (iatrogenics), often due to denial of antifragility and overconfidence in human intervention.

politics · education↗

Flashes of Inspiration

Flashes of inspiration are starting points in creative processes where ideas seem to arise spontaneously, often in art, music, and mathematics, before logical development takes over.

education · music↗
Mental Modelsintermediate

Flipping the Script on Identity

Making scout mindset (truth-seeking) a core part of your identity can help you overcome resistance from other identities. It becomes easier to change your mind and face hard truths.

education · sociology↗
Mental Modelsintermediate

Flood In

Musashi advises changing tactics at a combat impasse while continuing the attack. His emphasis is on practising enough variations to change approach without hesitation.

business · military↗
Mental Modelsintermediate

Flow State (Csíkszentmihályi)

Flow is deep absorption in an activity, often accompanied by a sense of control and altered awareness of time. Csíkszentmihályi’s model emphasizes a workable balance between challenge and skill, clear goals, and feedback.

psychology↗