Paradoxes | Senko's Activity Log

The Abilene Paradox — When Everyone Agrees on Something Nobody Wants

Achilles and the Tortoise — Can the Fastest Hero Never Catch the Slowest Animal?

All Horses Are the Same Color — The Flaw in Mathematical Induction

The Banach–Tarski Paradox — Decompose a Ball and Reassemble It Into Two?

Berkson's Paradox — Why Attractive People Seem to Have Worse Personalities

Bertrand's Paradox — How the Definition of 'Random' Changes the Answer

The Birthday Paradox — With Just 23 People, the Odds of a Shared Birthday Exceed 50%

The Bootstrap Paradox — Information or Objects With No Origin

Braess's Paradox — Adding a Road Can Make Traffic Worse

Cantor's Diagonal Argument — Some Infinities Are Larger Than Others

The Paradox of Choice — Too Many Options Make People Unhappy

The Fallacy of Composition — What's Rational for One Can Be Irrational for All

The Voting Paradox — Why Majority Rule Can Fail to Reflect the Public Will

The Crocodile Paradox — A Promise That Cannot Be Kept No Matter What

The Deterrence Paradox — Weapons Kept to Ensure They Are Never Used

The Easterlin Paradox — More Income Doesn't Make a Nation Happier

The EPR Paradox — Particles Far Apart Influence Each Other Instantly

The False Positive Paradox — A Positive Test Result May Still Mean You're Healthy

The Fermi Paradox — If Aliens Exist, Where Are They?

The French Paradox — Why Do the French Have Low Heart Disease Despite a Rich Diet?

Gabriel's Horn — Finite Volume but Infinite Surface Area

Galileo's Paradox — Are There as Many Perfect Squares as Natural Numbers?

The Garage Paradox — Can a Car Longer Than the Garage Fit Inside?

The Giffen Paradox — When Rising Prices Increase Demand

The Grandfather Paradox — What Happens If You Kill Your Grandfather in the Past?

The Grue Paradox — Can Induction Really Be Trusted?

Hempel's Raven Paradox — Does a Red Apple Prove All Ravens Are Black?

Hilbert's Infinite Hotel — A Full Hotel That Can Always Take One More Guest

The Innovator's Dilemma — Why Great Companies Fail by Doing Everything Right

The Liar's Paradox — Is 'This Statement Is False' True or False?

World's Paradoxes — The Complete List: Philosophy, Math, Physics & Economics

Maxwell's Demon — Can a Tiny Demon Generate Energy From Nothing?

Meno's Paradox — How Can You Search for Something You Don't Know?

The Missing Dollar — How Do 30 Dollars Become 29?

The Monty Hall Problem — Why Switching Doors Doubles Your Winning Chance

Olbers' Paradox — If There Are Infinite Stars, Why Is the Night Sky Dark?

The Omnipotence Paradox — Can God Make a Stone Too Heavy to Lift?

The Prisoner's Dilemma — Betrayal Is Rational, but Cooperation Is Better

Russell's Paradox — The Contradiction That Shook the Foundations of Mathematics

Schrödinger's Cat — Alive and Dead at the Same Time

The Ship of Theseus — Is a Fully Replaced Ship Still the Same Ship?

Simpson's Paradox — Winning Every Group but Losing Overall

The Sleeping Beauty Problem — Does a Coin's Probability Change by Day of the Week?

The Sorites Paradox — Does Removing One Grain Stop It Being a Heap?

The St. Petersburg Paradox — How Much Would You Pay to Play a Game With Infinite Expected Value?

The Swampman — Is a Perfect Accidental Copy Really the Same Person?

The Tea Leaf Paradox — Why Do Tea Leaves Gather in the Center, Not the Edges?

Thomson's Lamp — After Infinite Switches, Is the Lamp On or Off?

The Three Prisoners Problem — Does Hearing a Fellow's Fate Change Your Own Odds?

The Paradox of Thrift — How Saving by Everyone Makes Everyone Poorer

Tocqueville's Paradox — Why Improving Conditions Breed More Discontent

The Paradox of Tolerance — To Remain Tolerant, You Must Not Tolerate Intolerance

The Tragedy of the Commons — When Everyone Acts Rationally, Everyone Loses

The Twin Paradox — Only the Traveling Twin Stays Young

The Two Children Problem — 'At Least One Is a Boy' Changes the Probability

The Surprise Exam Paradox — A Logically Announced Surprise Is Impossible?

Wigner's Friend — What If Someone Observes the Observer?