June 2026
May 2026
April 2026
March 2026
- Mar 8, 2026ConceptsCommon Decision Traps and How to Avoid ThemPronin, Lin and Ross showed in 2002 that people spot biases readily in others and hardly at all in themselves, and that knowing you are susceptible does not predict actually resisting it. That finding is the whole argument for process over vigilance, since vigilance is exactly what fails under pressure. Covers confirmation bias, sunk cost, anchoring, availability, groupthink and status quo bias, how they compound, and the structural countermeasures that work.
- Mar 5, 2026ConceptsMental Models That Make Every Decision SharperA working set of decision models, each with the conditions under which it fits: second-order thinking, inversion, first principles, opportunity cost, margin of safety and probabilistic thinking. Gary Klein's Recognition-Primed Decision work found experienced experts rarely compare options at all, and Chase and Simon's 1973 chess studies showed masters rebuilt positions from 5-second glances by chunking patterns, not better memory.
February 2026
- Feb 18, 2026ConceptsHow to Choose the Right Mental ModelModel selection is the meta-skill: matching problem type to thinking tool, testing fit by retrodiction and boundary cases, and triangulating with two to four models from different traditions. Tetlock's forecasting research found that foxes, who drew on many models, outperformed hedgehogs organized around one central model, with the gap widest on long-range forecasts inside their own expertise. Foxes noticed a failing model sooner and switched.
- Feb 17, 2026ConceptsProblem-Solving Frameworks Used by ExpertsEight frameworks with the problem type each one fits, plus where each breaks: 5 Whys, Ishikawa fishbone, MECE, issue trees, hypothesis-driven investigation, first principles, pre-mortem and 80/20. The research behind the structure-first habit is De Groot's 1965 chess study, which found grandmasters searched fewer moves than weaker players, not more. Their edge was scoping to a few promising candidates and going deep on those.
- Feb 16, 2026ConceptsWhen Frameworks FailFrameworks fail in patterns you can spot in advance, among them context mismatch, rigidity bias, static models in changing markets, and mistaking the map for the territory. The Gaussian copula is the sharpest case: David Li's correlation formula was calibrated on corporate bond defaults in stable credit conditions, then applied to mortgages in a housing market that had never fallen nationwide, with his own warning left out.
- Feb 9, 2026ConceptsInterpreting Data Without Fooling YourselfCorrelation confusion, p-hacking, base rate neglect, Simpson's paradox, survivorship bias, regression to the mean, cherry-picking and ignored effect sizes, each with a worked example and a countermeasure. Simmons, Nelson and Simonsohn's 2011 False-Positive Psychology paper showed that undisclosed analytical flexibility can push false positive rates as high as 61 percent while the nominal threshold stays at 5 percent.
December 2025
- Dec 24, 2025TechnologyCausation vs Correlation: Key DistinctionsCorrelation can reflect genuine causation, reverse causation, a common cause, coincidence, or a tangle of causal paths, and the article works through each before laying out the Bradford Hill criteria. The sharpest case is hormone replacement therapy: Nurses' Health Study observational data linked it to less coronary heart disease for decades, until the 2002 Women's Health Initiative trial found it raised the risk of heart disease, stroke, and breast cancer.
- Dec 23, 2025TechnologyCommon Analytics Mistakes and Their ImplicationsHewlett-Packard found employees living far from headquarters quit more in their first year, strongly and significantly, and changed recruiting to favor nearby candidates. The confound was compensation: those campuses paid below local market, so staff both commuted from cheaper suburbs and left for better-paying competitors. Proximity had nothing to do with it. Correlation misleads through confounding, reverse causation, and spurious matches that are inevitable at scale.
- Dec 19, 2025TechnologyData Interpretation: Avoiding Common PitfallsTufte later rebuilt the analysis with every previous launch included, and the relationship between temperature and damage was unmistakable, with the 31 degree launch far outside anything observed. Absence of a pattern in incomplete data is not evidence of no pattern. The page covers confounding, reverse causation and selection effects, what a p-value does and does not mean, the multiple comparison problem, survivorship bias, and Simpson's paradox.
November 2025
- Nov 11, 2025Work SkillsUnderstanding Logical Fallacies to Identify Flawed ArgumentsTen fallacies that do the most professional damage, from sunk cost to straw man, each with workplace examples and a question that defuses it. The article explains why awareness is not enough: Mercier and Sperber's argumentative theory holds that reasoning evolved to build and judge arguments socially, which fits the finding that people spot flaws in an argument far more readily when it is attributed to someone else.
- Nov 10, 2025Work SkillsAnalytical Thinking Skills: Simplifying Complex ProblemsAnalytical thinking is explicit and reproducible: two practitioners applying the same framework to the same data should reach similar conclusions, a property intuition fundamentally lacks. The Netflix Prize winners decomposed a massive dataset into component signals rather than guessing what viewers wanted. When Amazon saw fulfillment times rising, analysts did not call it a speed problem but split it into receiving, shelving, pick-path, packing and dock scheduling.
- Nov 6, 2025Work SkillsReasoning Errors Explained: Common Logical Fallacies at WorkReasoning errors corrupt the step from evidence to conclusion, so perfect data still yields wrong calls. Long-Term Capital Management, with two Nobel laureates on its board, built risk models on 1987 to 1997 data that excluded every major crisis of the century: the models capped daily losses at $35 million, and by August and September 1998 losses were running $500 million a day. Learn the trigger phrases, diagnostic questions, the Toulmin model and Klein's pre-mortem.
- Nov 6, 2025Work SkillsCommon Problem Solving Mistakes That Hinder SolutionsThe most expensive error is solving the wrong problem well. Target opened 124 Canadian stores in its first year, diagnosed empty shelves as supply chain execution, and poured money into logistics before closing every store two years later. The post-mortem found the real causes were poorly selected former Zellers locations in declining malls, an assortment mismatched to Canadian preferences, and prices above cross-border expectations.
- Nov 4, 2025Work SkillsCritical Thinking: Enhancing Decision-Making SkillsKeith Stanovich spent three decades comparing intelligence with rational thinking and found the correlation runs only about r = 0.20 to 0.35, meaning IQ explains roughly 4 to 12 percent of the variance in critical thinking performance. He named the gap dysrationalia: smart people reasoning badly because they lack the dispositions, not the capacity. This covers the core skills, groupthink countermeasures, pre-mortems, steelmanning and red teaming.
August 2025
July 2025
June 2025
- Jun 18, 2025ExplainersPhilosophical Roots of Critical ThinkingEight traditions built the concept, from Aristotle's syllogism and thirteen fallacies through Cartesian doubt and scientific falsifiability to Freire's critical consciousness. The empirical record is sobering. Paul and Elder surveyed over 1,000 faculty: 89 percent named critical thinking a primary objective, yet under 20 percent could define it consistently with any recognized framework.
- Jun 15, 2025ExplainersStep-by-Step: Evaluating Information QualityWineburg and McGrew's 2019 Stanford work found professional fact-checkers assessed unfamiliar websites faster and more accurately than historians or students, because they left the source page to see what others said about it, a habit the researchers called lateral reading. The guide builds a six-step workflow around accuracy, credibility, objectivity, currency, coverage and relevance, then asks you to state your confidence as a probability.
May 2025
March 2025
December 2024
November 2024
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July 2024
May 2024
March 2024
- Mar 25, 2024CultureWhy Experts Disagree: The Nature of Scientific ControversyTetlock collected 82,361 forecasts over twenty years and found experts barely beat chance, with the most confident performing worst. This separates expert disagreement into four kinds: genuine frontier uncertainty, values dressed as facts, researcher motivated reasoning, and doubt manufactured to delay regulation. Includes the test for when expert intuition is reliable.
- Mar 13, 2024CultureWhat Is Epistemology: How We Know What We KnowPlato's Theaetetus, written around 369 BCE, supplied the definition that held for two millennia: knowledge is justified true belief. Gettier's three-page 1963 paper broke it with cases where a belief is justified and true but true by accident, like taking a dog for a sheep while a real sheep stands hidden behind the hill. Sixty years of repairs, reliabilism, proper functionalism, virtue epistemology, have produced no consensus.
February 2024
December 2023
October 2023
June 2023
March 2023
- Mar 28, 2023Work SkillsCritical Thinking: Skills and Barriers to ImprovementWhat critical thinking is and why intelligence does not supply it. The skill requires two components present together: intellectual skills, meaning the ability to analyze arguments, identify assumptions and evaluate evidence, and intellectual dispositions, meaning genuine willingness to revise beliefs while staying humble, curious and fair-minded. Research finds many highly educated adults still reason poorly when evidence conflicts with what they already believe.
- Mar 22, 2023Work SkillsEnhancing Your Inquiry Skills with Better QuestionsTwelve years of recording across 23 countries showed that stacking up context questions reads as form-filling, while implication questions that draw out consequences do the real work. The social return is underrated too: Huang and colleagues found that asking more follow-up questions makes people markedly more likeable, and that we consistently underestimate this compared with talking about ourselves. Silence helps, since pausing after an answer usually produces more of it.
December 2022
- Dec 29, 2022ConceptsWhat Is Narrative Fallacy: How Stories Mislead UsTaleb's term for imposing a causal story on a sequence of events, so a known outcome feels inevitable. Phil Rosenzweig documented it in strategy research: the same company, strategy and leader is described as brilliantly decisive when outcomes are good and recklessly overconfident when they are bad. Denrell's simulations found the performance patterns behind celebrated companies are consistent with random variation that then mean-reverts.
- Dec 22, 2022ConceptsUnderstanding Confirmation Bias in Decision-MakingConfirmation bias explained through the experiment that defined it. Peter Wason showed participants 2, 4, 6 and asked them to find the rule; almost all proposed only sequences that fit their first guess, so the actual rule, any ascending sequence, went undiscovered. Lord, Ross and Lepper found in 1979 that giving both sides the same mixed evidence on capital punishment made each group more confident, which means balanced information does not reliably correct bias.
- Dec 17, 2022ConceptsThe Scientific Method: Process and Practical ApplicationsNone found more than five and 16 percent found none at all, which makes peer review an error-reduction process rather than an error-elimination one. The page is equally direct about replication, noting that of 100 studies the Open Science Collaboration repeated in 2015, only 36 percent produced significant results. Popper's useful question survives all of it: what observation would change your mind?
- Dec 11, 2022ConceptsWhat Is a Mental Model and How to Build a Better ToolkitPhilip Tetlock's Expert Political Judgment research tracked roughly 28,000 predictions from 284 experts over about two decades and found the best forecasters were separated not by domain expertise but by cognitive style, drawing on models from several fields instead of filtering everything through one. The article catalogs the models worth learning and covers decision journals, stress testing, and single-model dominance.
- Dec 8, 2022ConceptsWhat Is Deductive vs Inductive ReasoningHolmes reads a tan line and the soil on a boot and concludes a man served in Afghanistan. That is abduction, inference to the best explanation, formalized by Charles Sanders Peirce, not deduction at all. The distinction matters: deductive conclusions are guaranteed by their premises, inductive ones only supported, abductive ones merely the best fit so far. The article covers Hume's problem of induction, Popper's answer, and Wald's survivorship analysis of returning bombers.
October 2022
- Oct 8, 2022ConceptsWhat Is Epistemic Humility: Knowing What You Don't KnowSo confidence should track evidence, which is what Tetlock's superforecasters do. They had no higher IQ and no better information, but they stated beliefs as probabilities, updated in small increments and named in advance what would change their minds, so their 90 percent predictions came true near 90 percent of the time. The page is careful with Dunning-Kruger too, noting later work found it weaker and partly a regression artifact.
- Oct 5, 2022ConceptsHow to Think Like a Scientist in Everyday LifeWhen a belief is tied to group identity, intelligence gets spent on rationalizing the pre-committed position. The correctives are base rates and the outside view, and Flyvbjerg's infrastructure research shows the stakes: nine out of ten large transport projects exceeded their initial cost estimates, with average overruns near 45 percent for rail and 20 percent for roads. The useful question stays simple: what would change my mind?
- Oct 3, 2022ConceptsWhat Is Fermi Estimation: How to Estimate AnythingAt the 1945 Trinity test, Enrico Fermi dropped torn paper into the passing shock wave and calculated a yield of about 10 kilotons against a measured 18 to 21 kilotons, off by roughly a factor of two. The article works through the Chicago piano tuner problem step by step, supplies a table of reference quantities worth memorizing, explains why errors in a multiplicative chain tend to cancel, and includes worked practice problems on golf balls, gas stations and market sizing.
August 2022
- Aug 27, 2022ConceptsFluency Effect: Why Easy Processing Feels TrueMcGlone and Tofighbakhsh found the smoother phrasing read as truer regardless, which is why a well-typeset lie reads more credibly than a poorly typeset truth. Repetition does the same work, and Fazio found the illusory truth effect still operates in people who already hold the accurate knowledge. Knowing the right answer does not fully protect you, so repetition alone can raise the credibility of a false claim.
- Aug 24, 2022ConceptsUnderstanding Intellectual Humility and Its ImportanceThe CIHS measures it partly as independence of intellect and ego, meaning how far your self-worth has been detached from being right, which is why admitting error feels like a threat rather than an update. The page also separates it from two neighbors that borrow its language: epistemic cowardice dodges difficulty, and epistemic servility caves to social pressure. Neither is humility, since both avoid engaging the evidence.
May 2022
September 2021
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