Theory Library
The frameworks and mental models behind the headlines — each scored by its Plausibility Index™.
Nash Equilibrium
Nash Equilibrium is the principle that a stable outcome exists where each player's strategy is optimal given all other players' choices.
Opportunity Cost
Opportunity Cost is the principle that every choice requires sacrificing the next-best alternative, making the true cost of any decision what you give up, not just what you pay.
Ship of Theseus
Ship of Theseus is the thought experiment asking whether an object retains its identity after all its material parts are gradually replaced.
The Double-Slit Experiment
The double-slit experiment is the principle that particles exhibit wave-particle duality, behaving as waves when unobserved but as particles when measured.
The Prisoner's Dilemma
The Prisoner's Dilemma is the principle that rational self-interest can lead to collectively worse outcomes when parties cannot communicate or enforce cooperation.
Feedback Loops
Feedback loops are the principle that system outputs circle back to influence their inputs, creating self-reinforcing or self-correcting patterns.
Loss Aversion
Loss Aversion is the principle that losses feel roughly twice as painful as equivalent gains feel pleasurable, driving asymmetrical decision-making across contexts.
Network Effects
Network Effects is the principle that a service or platform becomes exponentially more valuable as more people use it, creating self-reinforcing growth and competitive advantages.
Cognitive Dissonance
Cognitive Dissonance is the principle that psychological discomfort from conflicting beliefs drives people to rationalize, dismiss, or alter their beliefs to restore mental consistency.
Sunk Cost Fallacy
Sunk Cost Fallacy is the tendency to continue investing in failing endeavors because of past expenditures rather than future costs and benefits.
The Bystander Effect
The bystander effect is the principle that individuals are less likely to help someone in need when other witnesses are present, due to diffusion of responsibility and pluralistic ignorance.
The Cobra Effect
The Cobra Effect is the principle that poorly designed incentives can inadvertently increase the very problem they're meant to solve.
Goodhart's Law
Goodhart's Law is the principle that when a measure becomes a target for optimization, it ceases to be a reliable measure of what it was intended to assess.
Moral Panic
Moral panic is the principle that societies collectively amplify minor threats into perceived existential crises, driven by media coverage and reflecting deeper anxieties rather than proportionate risk assessment.
Swiss Cheese Model
Swiss Cheese Model is the principle that disasters occur when multiple independent safety barriers fail simultaneously and their weaknesses align.
The Butterfly Effect
The Butterfly Effect is the principle that minute changes in initial conditions can cascade into vastly different outcomes in chaotic systems.
The Halo Effect
The Halo Effect is the tendency to let a single positive impression of someone or something color our judgment of their other unrelated traits.
The Nocebo Effect
The Nocebo Effect is the principle that negative expectations can produce real adverse physiological symptoms through neurobiological mechanisms independent of any active treatment.
The Pareto Principle
The Pareto Principle is the observation that roughly 80% of effects typically come from 20% of causes across diverse domains.
The Placebo Effect
The placebo effect is the principle that belief in a treatment activates real neurobiological healing mechanisms, independent of the treatment's pharmacological properties.
The Trolley Problem
The Trolley Problem is the thought experiment showing that human moral reasoning relies on emotional intuitions that diverge from abstract utilitarian logic.
Allostatic Load
Allostatic load is the principle that chronic activation of stress-response systems causes cumulative biological damage across multiple physiological systems.
Jevons Paradox
Jevons Paradox is the principle that efficiency improvements in resource use typically increase overall consumption by lowering effective costs and expanding demand.
Occam's Razor
Occam's Razor is the principle that simpler explanations requiring fewer assumptions are generally preferable to more complex ones.
The Streisand Effect
The Streisand Effect is the principle that attempts to censor or suppress information paradoxically amplify its spread and public interest.
Black Swan Theory
Black Swan Theory is the principle that rare, unpredictable outlier events often have outsized historical impact despite being impossible to foresee.
Dunning-Kruger Effect
Dunning-Kruger Effect is the principle that incompetence prevents people from recognizing their own lack of skill, leading to unwarranted confidence.
First-Mover Advantage
First-mover advantage is the principle that entering a market before competitors can create lasting competitive benefits through customer lock-in, resource control, and norm-setting.
Hanlon's Razor
Hanlon's Razor is the principle that simpler explanations rooted in error or incompetence should be favored over assumptions of malice or conspiracy.
Hormesis
Hormesis is the principle that low doses of potentially harmful stressors trigger adaptive responses that increase resilience and protective capacity.
Metcalfe's Law
Metcalfe's Law is the principle that a network's value grows exponentially with the square of its users, not linearly.
Moore's Law
Moore's Law is the principle that transistor density on computer chips doubles approximately every two years, enabling exponential growth in computing power.
Moral Licensing
Moral licensing is the tendency to engage in unethical behavior after performing virtuous acts, as if good deeds grant psychological permission for subsequent moral lapses.
Parkinson's Law
Parkinson's Law is the principle that work expands to fill the time available for its completion, explaining why tasks consume whatever deadline you assign.
The Gartner Hype Cycle
The Gartner Hype Cycle is the principle that emerging technologies follow a predictable pattern of initial excitement, disillusionment, and eventual productive integration.
The Innovator's Dilemma
The Innovator's Dilemma is the principle that successful companies pursuing rational strategies to serve existing customers become vulnerable to disruptive innovations from simpler, cheaper competitors.
The Overton Window
The Overton Window is the idea that acceptable political discourse operates within a shifting range of opinion, moving ideas from unthinkable fringe to mainstream policy over time.
The Peter Principle
The Peter Principle is the idea that people rise through hierarchies until promoted to a level where they lack the skills to perform competently.
Six Degrees of Separation
Six Degrees of Separation is the principle that any two people on Earth are connected through at most six social intermediaries.
Broken Windows Theory
Broken Windows Theory is the principle that unrepaired signs of disorder signal neglect and enable escalating crime if left unchecked.
Maslow's Hierarchy of Needs
Maslow's Hierarchy of Needs is the principle that human motivation progresses through levels from basic physiological survival to self-actualization.