ONE OF SEVEN WAYS OF SEEING
Recognize the shortcuts that quietly shape your judgment.
Be cautious of progress updates that highlight only achievements while ignoring remaining work, and watch for 'rabbit out of the hat' excuses blaming unforeseen setbacks. Also consider how past solutions may contribute to current problems.
Seek evidence that could challenge a belief, then examine the assumptions that depend on it. Revising a central belief can open related views to reconsideration.
Loss aversion is the tendency for people to weigh losses more heavily than equivalent gains, leading to a bias toward maintaining the status quo and an unwillingness to part with possessions (endowment effect).
Taleb warns that sample volatility and correlation can be unstable in settings dominated by extreme events. His broader criticism concerns treating a single historical estimate as a dependable property of the future; non-Gaussian data alone do not make those statistics meaningless.
Magical contagion is the belief that negative or positive properties are transferred through physical contact, often permanently. It is characterized by features such as physical contact being critical, dose insensitivity, negativity bias, and backward contagion.
Magical thinking is a cognitive bias where causal connections are made between events based on superstition rather than logic or evidence, leading to irrational fears or beliefs.
Mail-in rebates exploit people's unrealistic optimism about their ability to complete the redemption process, leading to low actual redemption rates (10–40%) despite high predicted rates (~80%). Reducing sludge (hassle) significantly increases redemption, but firms often maintain sludge to take advantage of this bias.
Identify what you do not understand and test the assumptions behind your strongest beliefs. Read serious opposing arguments, recall past mistakes, and listen to people whose experience differs from yours.
Statistical knowledge can help people correct an intuitive judgment when a task makes the relevant rule apparent. Frequency formats, direct comparisons, and attention to base rates reduced errors in the studies discussed here. The authors argue that repeated within-subject comparisons can themselves prompt correction, changing what an experiment reveals about intuition.
Management fashions and lore offer appealing answers to uncertainty, often through slogans, success stories, and claims of universal effectiveness. Banasiewicz argues for testing those claims against evidence relevant to the organization and decision.
Management lore refers to flawed management beliefs or anecdotes that are so widely accepted they achieve the status of immutable facts, despite lacking empirical support. Examples include the idea that 'dreaming big' leads to success or that diversity always boosts creativity.
Matching predictions are errors caused by overestimating the predictive power of available information, leading to forecasts that fail to account for regression to the mean. This cognitive bias causes extreme predictions to be too extreme.
A study by Tversky et al. demonstrates that the method used to elicit preferences—choice, pricing, probability matching, or payoff matching—affects the relative weight given to attributes, leading to preference reversals due to scale compatibility and the prominence of probability over money.
Taleb argues that sensational anecdotes and retrospective explanations can distort risk perception. His concern is information consumed without context or useful checks, rather than a lack of information alone.
The tendency for large infrastructure projects to suffer from cost overruns and delays due to overly optimistic assumptions and lack of transparency, as documented by Bent Flyvbjerg.
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 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.
People often impose unnecessary constraints on problems, such as assuming blocks must touch each other, which makes solving simple problems difficult.
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.
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.
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.
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.
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.
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.
Intuitive forecasts often need to move toward a relevant baseline, with the adjustment depending on how informative the evidence is. Kahneman explains why this moderates extreme predictions and distinguishes the probability of success from a decision that depends on unequal costs of error.
Galef uses the 'Mommy Wars' over breastfeeding and formula feeding to illustrate how a factual dispute can become tied to identity. The reported exchanges show how perceived judgment and group loyalty can intensify disagreement.
The studies described associate happy mood with greater reliance on stereotypes and sad mood with more attention to individual details. The account also notes that a person who clearly contradicts a stereotype can disrupt that pattern.
Mood can influence both an evaluation and the way information is processed. The research discussed here links happy moods with greater reliance on heuristics and sad moods with closer attention to detail, without making either response inevitable.
Mood-congruent memory refers to the tendency to recall information that matches one’s current emotional state, with happy moods facilitating recall of positive material and sad moods facilitating recall of negative material.
Happy moods promote heuristic, imitative processing, while sad moods foster detail-oriented, analytical reasoning; these differential styles can either amplify or reduce cognitive biases depending on the task, such as increasing anchoring effects in sad individuals.
A persistent belief that the Apollo moon landings were faked, despite overwhelming evidence from thousands of workers, international scrutiny, and consistent firsthand accounts.
The Moon-landing hoax is a conspiracy theory claiming the Apollo Moon landings were faked by NASA and the US government. Despite overwhelming evidence, millions of people believe it, driven by cognitive biases such as susceptibility to compelling narratives, distrust of authority, and lack of scientific understanding.
People often use irrational optimism to motivate themselves when facing difficult tasks, downplaying baseline odds and selectively focusing on reasons for optimism. This morale helps decision-makers build enthusiasm and conviction, but can lead to ignoring risks and alternative plans.
A component’s share of net change can exceed the whole when other components are negative. Ellenberg’s job-growth example shows why such percentages need the underlying gains and losses to make sense.
The complexity of modern mortgages, with numerous options and hidden fees, exploits behavioral biases like present bias and creates sludge that disadvantages unsophisticated borrowers. Choice architecture solutions such as simplified disclosure, standardized 'EZ mortgages', and smart disclosure with choice engines can help consumers make better decisions.
Affective forecasts can be distorted by the immediate emotional benefits they provide, such as comfort, motivation, or defensive pessimism, leading people to overestimate the duration of emotional reactions to future events.
Motivated reasoning occurs when a desired conclusion shapes how we assess information. We may accept weak evidence for a conclusion we favor while demanding much stronger evidence against it. Studies of opposing football fans and responses to a protest illustrate how loyalties and values can influence judgments of the same events.
Motivated reasoning is the unconscious tendency to process information in a way that defends our preexisting beliefs, making us feel objective while acting like soldiers protecting a fortress.
The self-belief model says confidence motivates effort and makes success more likely, while contemplating failure undermines it. Galef asks whether that is a good reason to become irrationally optimistic, using her own acting ambitions and William James’s mountain-leap analogy.
A visual illusion where lines of equal length appear different due to arrowhead direction, demonstrating that perception can be systematically biased even when we know it's incorrect.
The tendency to focus on a single model that fits data, ignoring that many models may fit equally well when viewed on a broader scale.
Munger’s 25 tendencies form a practical checklist for examining misjudgment. He draws on psychology, business stories, and personal experience, emphasizing how incentives, habits, social pressures, and other influences can reinforce one another. This article outlines the framework rather than reproducing the full talk.
In Caulfield and Wineburg’s Fukushima flowers example, students sometimes accepted a striking photo as proof of toxicity or dismissed it as fake. Both responses skipped investigation of what the real image actually showed.
The mistaken belief that current success or dominance in a population is necessarily evidence of superior evolutionary fitness, ignoring the role of randomness, small sample sizes, and local optima. It is a specific manifestation of the survivorship bias and the law of small numbers applied to evolutionary thinking.
Naïve empiricism is the natural tendency to seek and treat confirming instances as evidence while ignoring disconfirming evidence, leading to overconfidence in our theories and stories.
Naive interventionism is the tendency to intervene and 'do something' even when inaction would be better, often resulting in harm due to unawareness of the break-even point between benefits and harms. Taleb illustrates this with the example of children being recommended tonsillectomies by successive doctors.
Naive realism is the tendency to believe that one's own perspective is objective and that others, if rational, should share it; when they don't, it's due to lack of information, irrationality, or bias.
Naive realism is the tendency to believe that we see the world objectively and that others who disagree are biased, ignorant, or irrational. This bias leads people to overestimate biases in others while remaining unaware of their own subjective influences.
Narratives reduce complex information into simpler, more memorable stories, but this can cause people to overestimate the probabilities of events within the story, as seen when readers assign high probabilities to multiple suspects in a detective novel.
The narrative fallacy occurs when a coherent story gives us more confidence in an explanation than the evidence warrants. Retrospective accounts can hide luck, failed alternatives, and missing information, making an outcome seem more predictable than it was.
People tend to unduly narrow their options when making decisions, often due to false constraints or limited perspective. By reframing the question, they can discover many more viable possibilities.
A bias where, for concave functions, the average of the function is less than the function of the average, leading to underestimation of harm from variability. This makes fragile systems more harmful than expected.
Negativity bias is the tendency to give negative events more attention or weight than positive events of similar intensity. An evolutionary explanation connects this tendency with the value of noticing threats.
Negative information can attract more attention and carry more weight than comparable positive information. The source connects this asymmetry to threat detection and discusses its effects on impressions, relationships, and judgments.