THE REFERENCE LIBRARY
A growing collection of ideas for understanding the world — and your own thinking.
Memes are cultural items that replicate through imitation, analogous to genes, providing a third source of design beyond genetic natural selection and deliberate intelligent design. They have their own fitness, sometimes independent of human well-being, and can be beneficial or harmful symbionts.
Memory supports retaining information, recalling it, recognizing it and placing it in context. This historical account emphasizes attention and association while also advancing speculative claims about subconscious storage that should be distinguished from its practical suggestions.
Memory reconstructs events rather than replaying a faithful recording, and cognitive biases can further distort judgment. Harrison connects those limitations to skepticism: assess the evidence, remain willing to change your view, and offer explanations rather than simply dismissing a claim.
Human memory is selective, reconstructive, and prone to distortion, leading to inaccurate recall and false memories, which has significant implications in eyewitness testimony and legal contexts.
Memories of dramatic events can change even when they feel vivid and certain. Suggestion can alter recollection or contribute to false memories, so confidence alone does not establish accuracy.
Mental accounting describes how people evaluate choices by creating mental accounts that compare advantages and disadvantages relative to a reference state, often using topical accounts that lead to inconsistent behavior.
Mental accounting is the system households use to evaluate, regulate, and process their home budget, often violating the principle of fungibility. It helps with self-control by treating money in different mental accounts as non-fungible.
Mental accounting is the tendency to compartmentalize money and outcomes into separate mental accounts, leading to decisions that violate rational economic principles. It explains why people treat money differently based on its source or intended use, often resulting in sunk-cost fallacies and the disposition effect.
Mental contamination refers to unconscious or uncontrollable mental processing that results in unwanted judgments, emotions, or behavior. People often lack awareness of how their impressions are formed, making it difficult to detect and correct such contamination.
Demanding mental tasks compete for attention and working memory. Daniel Kahneman describes experiments in which pupil dilation tracked changing demands during paced digit tasks such as Add-1 and Add-3. Practice, external notes, and dividing a task into steps can reduce the effort needed at any moment.
Mental models are internal representations that organize knowledge about systems, influencing how we interpret experiences and behave. Their structure differs based on experience, with experts having more developed networks and procedural knowledge.
Mental models are deeply held internal images, assumptions, and stories that shape how we understand the world and take action. They can prevent new ideas from being implemented because they conflict with existing beliefs, and they often operate below our level of awareness.
Systems thinking and mental models are complementary disciplines; exposing hidden assumptions through mental models enables effective systems thinking, while systems thinking reveals systematic flaws in mental models.
Mental models are personal interpretations of reality shaped by individual experiences, beliefs, and perceptions, not objective facts. Each provides a framework for thinking and decision-making.
Mental models are incomplete representations of reality shaped by beliefs, attitudes, preferences, knowledge, and experience. They can change as we learn.
Royal Dutch Shell used scenario planning to surface and challenge managers' mental models, enabling them to anticipate and adapt to the oil market upheavals of the 1970s and 1980s.
Mental models are cognitive frameworks that help us interpret the world and solve problems, but over-reliance on a narrow set can narrow our perspective and lead to suboptimal outcomes.
Mental models can help compare uses of time by making costs, alternatives, and priorities explicit. That comparison can guide action, though it does not guarantee motivation or productivity.
Mental models are belief systems that shape how teachers perceive their role and the learning process. Examining these underlying assumptions can help educators adopt more effective, student-centered teaching methods.
People hold different mental models of contagion, ranging from physical (germs, residues) to nonphysical (spiritual, symbolic, associative), which influence how they perceive contamination and purification.
Mental models simplify a situation by representing relationships among its parts. They help you reason about a system while leaving out some of its detail.
Mental models are simplified representations of how the world works, derived from various disciplines, that help people make better decisions by reducing complexity. Warren Buffett and Charlie Munger advocate mastering models from multiple fields to improve decision-making and avoid the pitfalls of narrow specialization.
People often impose unnecessary constraints on problems, such as assuming blocks must touch each other, which makes solving simple problems difficult.
These exercises use a candle, an apple, and number sequences to practice forming and manipulating mental images. They offer prompts for attention and imagination, rather than a demonstrated program for improving general memory.
Mere Association is a psychological phenomenon where we automatically feel pleasure or pain when connecting a stimulus with a past experience, influencing our preferences and decisions without rational evaluation.
The mere exposure effect is a psychological phenomenon where people develop a preference for stimuli simply because they are familiar with them through repeated exposure, even without conscious recognition of the exposure.
The mere-exposure principle states that people develop a preference for things simply because they are familiar. Combined with loss aversion, it creates a powerful status-quo bias that distorts decision-making.
This essay compares relationships with mergers, acquisitions, and joint ventures to discuss control, shared costs, and personal investment. Its argument relies on a sexual-market-value model and broad assumptions about men and women; the accounting analogy does not establish those assumptions.
The Mertonian norm of communism treats scientific knowledge as a shared resource. Applied to a decision group, it means agreeing to share the information needed to assess a choice, including details that make the storyteller uncomfortable.
Coherence arises from boundaries and constraints, allowing diversity and messiness within a structured system. This principle, central to Cynefin, emphasizes that methods and tools have bounded applicability within specific contexts.
Metanoia is a fundamental shift of mind that lies at the heart of genuine learning and learning organizations, moving beyond passive information intake to generative learning that expands our capacity to create the future.
An ancient Greek method for calculating areas and volumes by inscribing and circumscribing polygons with increasingly many sides to closely approximate curved shapes, famously used by Archimedes to estimate π.
Taleb criticizes imposing the metric system solely on grounds of rational efficiency. He argues that familiar traditional units can have practical and intuitive value that reformers overlook.
The middle ground fallacy occurs when one assumes that the truth must lie somewhere between two conflicting views, without considering evidence. This flawed reasoning is often a result of intellectual laziness, as the middle ground is not always correct.
The Miles and Snow framework describes four organizational approaches: Defender, Prospector, Analyzer, and Reactor. They differ in how a business develops markets, manages its established activities, and responds to change. This article also applies the labels to dating behavior, but that extension is an analogy rather than an established classification of people.
How milestones are planned and progress is tracked can inadvertently increase the risk of last-minute disappointments. Seemingly innocent choices in target setting and measurement criteria often push problems into the future, creating a 'hockey stick' effect that hides accumulating risk.
The mind projection fallacy occurs when we wrongly attribute properties of our own mental states or perceptions to external objects, assuming that our subjective experiences reflect objective features of the world. For example, concluding that sugar is inherently sweet, or projecting harmful stereotypes onto groups based on biased judgments.
Taleb examines delays between discovery and practical adoption. He argues that caution about an unfamiliar technology differs from preserving a harmful practice or refusing a clearly useful alternative, and he attributes some delays to professional incentives and inertia.
The brain and a computer perform different kinds of work, so storage and speed analogies do not establish a general ranking between them. Chess illustrates a more useful distinction: a player can work backward from a promising position to the moves that might reach it, using the ends-and-means heuristic.
A technique to visually connect ideas and abstract concepts, helping to summarize and create a mental image of relationships between nodes.
A mind-set brings past experiences and beliefs together into a framework for interpreting new information. It lets us respond quickly, but it can also make a familiar explanation feel convincing before we have checked the evidence.
Our understanding of the world is based on mental models that strongly correspond to reality but are inherently incomplete and fall short of fully representing it.
A mini habit is a deliberately small action repeated regularly, such as writing a few sentences or reading a page. Keeping the commitment manageable can make it easier to start on days when motivation is low and provide a basis for doing more.
The Minimalist heuristic is a cue-based decision strategy that uses only the direction of cues (sign) without knowledge of their validity, selecting cues randomly until one discriminates between options.
The minimum effective dose is the lowest dose that produces a defined benefit in a specified setting. It is considered alongside harmful effects and variation between patients; it does not by itself guarantee safety.
A decision framework for establishing safe or minimum staffing levels in organizations to reduce operational risks, with practical suggestions for identifying gaps and aligning resources.
A committed minority can sometimes shift a wider group’s opinion. Studies discussed here report thresholds of 10-25% under different conditions; these figures do not define a universal tipping point.
An unusual or unexplained event does not by itself establish a miracle. Harrison uses large-population arithmetic and thought experiments to argue for checking natural explanations and accepting uncertainty when the evidence does not settle a claim.
Systematic miscalibration is observed across domains of expert judgment, but the magnitude varies: experts with training in statistical modeling (e.g., meteorologists, economists) are less biased than predicted by the direct support account, while others (e.g., physicians, stockbrokers, sports commentators) align with it.
Expert probabilistic judgments are often miscalibrated, with patterns of overprediction, underprediction, and overconfidence depending on the discriminability of hypotheses and base rates. This miscalibration stems from reliance on intuitive support rather than extensional probability.
Misconstrual is a cognitive bias where individuals fail to consider that their specific conceptualization of a future event is only one of many possibilities, leading to inaccurate affective forecasting.
A small number of dramatic and vivid events are taken to outweigh a significant amount of statistical evidence.
This cognitive bias describes the error of using past data as a reliable predictor of the future without accounting for changing conditions, small or unrepresentative samples, the role of chance in performance, the omission of failures, and the influence of regression to the mean.
The principle that if you never miss a flight, you may be spending too much time at the airport; optimal decision-making involves accepting some probability of failure to avoid excessive costs, as illustrated by expected utility calculations.
Taleb uses refusing to run for a train as an image of choosing one’s own standards. His stoic advice is to reconsider which goals and external expectations deserve pursuit.
The missing data fallacy treats unavailable or unknown information as if it already confirms a claim. It shields the claim from challenge without supplying the evidence needed to assess it.
Mistakes offer a critical juncture: either update your beliefs and behaviors or cover up and persist in error. Effectively handling mistakes involves accepting responsibility, learning, committing to improvement, and repairing damage.
A logical fallacy that occurs when someone dismisses a proximate cause as irrelevant to an outcome, or overinflates its importance, often to avoid responsibility or obscure the causal role of immediate triggers.
The fallacy of assuming that what one does not understand is nonsense or lacking intelligence, leading to a dismissal of valuable knowledge that is not immediately comprehensible.
An inability to explain a practice does not establish that the practice lacks intelligence or value. Taleb warns against assuming that useful knowledge must have a reason we can readily articulate.