Original sequences
The original sequences were a series of essays written by Eliezer Yudkowsky between 2006 and 2009 on the blogs Overcoming Bias and Less Wrong. About half of these essays were organized into a number of thematically linked "sequences" of blog posts--hence the name.
In 2015, these sequences were edited into an ebook, Rationality: From AI to Zombies. The ebook leaves out some of the original posts, as well as adding some essays that were written by Yudkowsky during the same time but never previously collected into a named sequence. This page will serve to collect the older, deprecated sequences.
Of these, "Map and Territory," "Mysterious Answers to Mysterious Questions," "How to Actually Change Your Mind," and "Reductionism" were classified as "core sequences." There was also a distinction between "major" and "minor" sequences, though this was based on the size of the sequence rather than its importance.
Bolded essays are more important than other posts in the sequence, while italicized essays are relatively unimportant. Small essays are also less important, and are sometimes left out of the post listing altogether. Some essays are indented to indicate that they are tangents or self-contained elaborations upon a previous essay.
Other formats
The Sequences have been converted to eReader-compatible formats by several projects.
- Print ready versions by jb55 (GitHub). Has versions in Markdown, PDF, and ePub. ePubs can be converted to nearly any other format with calibre.
- lw2ebook by OneWhoFrogs (GitHub). Includes all sequences in ePub and mobi formats.
- Sequences in EPub and MOBI formats by ciphergoth
- PDF version of most sequences in a single file. Has cross-reference support for internal links (PDF links or footnotes), and page size is appropriate for tablets.
- Print ready versions by Jordan. Contains all posts of each sequence in one HTML file. [Dead link.]
- Github ePub, mobi, rst, and html formats available here.
- Living Luminously in ePub, mobi and html.
Two abridged indexes of Yudkowsky's sequences are XiXiDu's guide, or Academian's guide targeted at people who already have a science background.
Map and Territory
- The Simple Truth @yudkowsky.net
- What Do We Mean By "Rationality"?
- An Intuitive Explanation of Bayes's Theorem @yudkowsky.net
- Why truth? And...
- What is Evidence?
- How Much Evidence Does It Take?
- How to Convince Me That 2 + 2 = 3
- Occam's Razor
- The Lens That Sees Its Flaws
Mysterious Answers to Mysterious Questions
- Making Beliefs Pay Rent (in Anticipated Experiences)
- Belief in Belief
- Bayesian Judo
- Professing and Cheering
- Belief as Attire
- Focus Your Uncertainty
- The Virtue of Narrowness
- Your Strength As A Rationalist
- Absence of Evidence is Evidence of Absence
- Conservation of Expected Evidence
- Hindsight Bias
- Hindsight Devalues Science
- Fake Explanations
- Guessing the Teacher's Password
- Science as Attire
- Fake Causality
- Semantic Stopsigns
- Mysterious Answers to Mysterious Questions
- The Futility of Emergence
- Say Not "Complexity"
- Positive Bias: Look Into the Dark
- My Wild and Reckless Youth
- Failing to Learn from History
- Making History Available
- Explain/Worship/Ignore?
- "Science" as Curiosity-Stopper
- Applause Lights
- Truly Part of You
- Chaotic Inversion
How to Actually Change Your Mind
See also: Locating the hypothesis, Privileging the hypothesis, Litany of Gendlin, Litany of Tarski
Politics is the Mind-Killer
- A Fable of Science and Politics
- Politics is the Mind-Killer
- Policy Debates Should Not Appear One-Sided
- The Scales of Justice, the Notebook of Rationality
- Correspondence Bias
- Are Your Enemies Innately Evil?
- The Robbers Cave Experiment
- Reversed Stupidity is Not Intelligence
- Argument Screens Off Authority
- Hug the Query
- Rationality and the English Language
- The Litany Against Gurus
- Politics and Awful Art
- False Laughter
- Human Evil and Muddled Thinking
Death Spirals and the Cult Attractor
- The Affect Heuristic
- Evaluability and Cheap Holiday Shopping
- Unbounded Scales, Huge Jury Awards, & Futurism
- The Halo Effect
- Superhero Bias
- Mere Messiahs
- Affective Death Spirals
- Resist the Happy Death Spiral
- Uncritical Supercriticality
- Evaporative Cooling of Group Beliefs
- When None Dare Urge Restraint
- The Robbers Cave Experiment
- Every Cause Wants to be a Cult
- Guardians of the Truth
- Guardians of the Gene Pool
- Guardians of Ayn Rand
- The Litany Against Gurus
- Two Cult Koans
- Asch's Conformity Experiment
- Lonely Dissent
- Cultish Countercultishness
Seeing with Fresh Eyes
- Anchoring and Adjustment
- Priming and Contamination
- Do We Believe Everything We're Told?
- Cached Thoughts
- The 'Outside the Box' Box
- Original Seeing
- The Logical Fallacy of Generalization from Fictional Evidence
- How to Seem (and Be) Deep
- We Change Our Minds Less Often Than We Think
- Hold Off On Proposing Solutions
- Asch's Conformity Experiment
- On Expressing Your Concerns
- Lonely Dissent
- The Genetic Fallacy
- Noticing Confusion
- Your Strength as a Rationalist
- Absence of Evidence Is Evidence of Absence
- Hindsight Bias
- Hindsight Devalues Science
- Positive Bias: Look Into the Dark
- Against Rationalization
- Knowing About Biases Can Hurt People
- Update Yourself Incrementally
- One Argument Against An Army
- The Bottom Line
- What Evidence Filtered Evidence?
- Rationalization
- A Rational Argument
- Avoiding Your Belief's Real Weak Points
- Motivated Stopping and Motivated Continuation
- A Case Study of Motivated Continuation
- Fake Justification
- Fake Optimization Criteria
- Is That Your True Rejection?
- Entangled Truths, Contagious Lies
- Of Lies and Black Swan Blowups
- Anti-Epistemology
- The Sacred Mundane
- Against Doublethink
- Singlethink
- Doublethink: Choosing to be Biased
- No, Really, I've Deceived Myself
- Belief in Self-Deception
- Moore's Paradox
- Don't Believe You'll Self-Deceive
- Overly Convenient Excuses
- The Proper Use of Humility
- The Third Alternative
- Locating the hypothesis
- Privileging the Hypothesis
- But There's Still A Chance, Right?
- The Fallacy of Gray
- Absolute Authority
- How to Convince Me That 2 + 2 = 3
- Infinite Certainty
- 0 And 1 Are Not Probabilities
- Letting Go
- Feeling Rational
- The Importance of Saying "Oops"
- The Crackpot Offer
- Just Lose Hope Already
- The Proper Use of Doubt
- You Can Face Reality
- The Meditation on Curiosity
- Something to Protect
- No One Can Exempt You From Rationality's Laws
- Leave a Line of Retreat
- Crisis of Faith
- The Ritual
The Simple Math of Evolution
- An Alien God
- The Wonder of Evolution
- Evolutions Are Stupid (But Work Anyway)
- Speed limit and complexity bound for evolution
- Adaptation-Executers, not Fitness-Maximizers
- No Evolutions for Corporations or Nanodevices
- Evolving to Extinction
- The Tragedy of Group Selectionism
- Fake Optimization Criteria
A Human's Guide to Words
- The Parable of the Dagger
- The Parable of Hemlock
- Words as Hidden Inferences
- Extensions and Intensions
- Similarity Clusters
- Typicality and Asymmetrical Similarity
- The Cluster Structure of Thingspace
- Disguised Queries
- Neural Categories
- How An Algorithm Feels From Inside
- Disputing Definitions
- Feel the Meaning
- The Argument From Common Usage
- Empty Labels
- Taboo Your Words
- Replace the Symbol with the Substance
- Fallacies of Compression
- Categorizing Has Consequences
- Sneaking in Connotations
- Arguing "By Definition"
- Where to Draw the Boundary?
- Entropy, and Short Codes
- Mutual Information, and Density in Thingspace
- Superexponential Conceptspace, and Simple Words
- Conditional Independence, and Naive Bayes
- Words as Mental Paintbrush Handles
- Variable Question Fallacies
- 37 Ways That Suboptimal Use Of Categories Can Have Negative Side Effects On our Cognition
Reductionism
- Reductionism (i)
- Universal Fire
- Universal Law
- Dissolving the Question
- Wrong Questions
- Righting a Wrong Question
- Mind Projection Fallacy
- Probability is in the Mind
- The Quotation is not the Referent
- Qualitatively Confused
- Reductionism
- Explaining vs. Explaining Away
- Fake Reductionism
- Savanna Poets
Joy in the Merely Real
- Joy in the Merely Real
- Joy in Discovery
- Bind Yourself to Reality
- If You Demand Magic, Magic Won't Help
- Mundane Magic
- The Beauty of Settled Science
- Amazing Breakthrough Day: April 1st
- Is Humanism a Religion-Substitute?
- Scarcity
- To Spread Science, Keep It Secret
- Initiation Ceremony
- Awww, a Zebra
- Reductionism (ii)
- Hand vs. Fingers
- Angry Atoms
- Heat vs. Motion
- Brain Breakthrough! It's Made of Neurons!
- Reductive Reference
Zombies
- Zombies! Zombies?
- Zombie Responses
- The Generalized Anti-Zombie Principle
- GAZP vs. GLUT
- Belief in the Implied Invisible
- Zombies: The Movie
- Causal reference
- Reductionism (iii)
Quantum Physics
- Basic Quantum Mechanics
- Quantum Explanations
- Configurations and Amplitude
- Joint Configurations
- Distinct Configurations
- Where Philosophy Meets Science
- Can You Prove Two Particles Are Identical?
- Classical Configuration Spaces
- The Quantum Arena
- Feynman Paths
- No Individual Particles
- Identity Isn't In Specific Atoms
- Decoherence
- The So-Called Heisenberg Uncertainty Principle
- Which Basis Is More Fundamental?
- Where Physics Meets Experience
- Where Experience Confuses Physicists
- On Being Decoherent
- The Conscious Sorites Paradox
- Decoherece is Pointless
- Decoherent Essences
- The Born Probabilities
- Decoherence as Projection
- Entangled Photons
- Many Worlds
- Bell's Theorem: No EPR "Reality"
- Spooky Action at a Distance: The No-Communication Theorem
- Decoherence is Simple
- Decoherence is Falsifiable and Testable
- Quantum Non-Realism
- Collapse Postulates
- If Many-Worlds Had Come First
- Many Worlds, One Best Guess
- Living in Many Worlds
- Timeless Physics
- Mach's Principle: Anti-Epiphenomenal Physics
- Relative Configuration Space
- Timeless Physics
- Timeless Beauty
- Timeless Causality
- Timeless Identity
- Thou Art Physics
- Timeless Control
- Rationality and Science
- The Failures of Eld Science
- The Dilemma: Science or Bayes?
- Science Doesn't Trust Your Rationality
- When Science Can't Help
- Science Isn't Strict Enough
- Do Scientists Already Know This Stuff?
- No Safe Defense, Not Even Science
- Changing the Definition of Science
- Faster Than Science
- Einstein's Speed
- That Alien Message
- My Childhood Role Model
- Einstein's Superpowers
- Class Project
- Why Quantum?
Metaethics
- Heading Toward Morality
- No Universally Compelling Arguments
- 2-Place and 1-Place Words
- What Would You Do Without Morality?
- The Moral Void
- Created Already In Motion
- The Bedrock of Fairness
- Moral Complexities
- Is Morality Preference?
- Is Morality Given?
- Where Recursive Justification Hits Bottom
- My Kind of Reflection
- The Genetic Fallacy
- Fundamental Doubts
- Rebelling Within Nature
- Probability is Subjectively Objective
- Whither Moral Progress?
- The Gift We Give To Tomorrow
- Could Anything Be Right?
- Existential Angst Factory
- Can Counterfactuals Be True?
- Math is Subjunctively Objective
- Does Your Morality Care What You Think?
- Changing Your Metaethics
- Setting Up Metaethics
- The Meaning of Right
- Interpersonal Morality
- Morality as Fixed Computation
- Inseparably Right; or, Joy in the Merely Good
- Sorting Pebbles Into Correct Heaps
- Moral Error and Moral Disagreement
- Abstracted Idealized Dynamics
- "Arbitrary"
- Is Fairness Arbitrary?
- The Bedrock of Morality: Arbitrary?
- You Provably Can't Trust Yourself
- No License To Be Human
- Invisible Frameworks
Fun Theory
- Prolegomena to a Theory of Fun
- High Challenge
- Complex Novelty
- Continuous Improvement
- Sensual Experience
- Living By Your Own Strength
- Free to Optimize
- Harmful Options
- Devil's Offers
- Nonperson Predicates
- Amputation of Destiny
- Dunbar's Function
- In Praise of Boredom
- Sympathetic Minds
- Interpersonal Entanglement
- Failed Utopia #4-2
- Growing Up is Hard
- Changing Emotions
- Emotional Involvement
- Serious Stories
- Eutopia is Scary
- Building Weirdtopia
- Justified Expectation of Pleasant Surprises
- Seduced by Imagination
- The Uses of Fun (Theory)
- Higher Purpose
Ethical Injunctions
- Why Does Power Corrupt?
- Ends Don't Justify Means (Among Humans)
- Entangled Truths, Contagious Lies
- Protected From Myself
- Ethical Inhibitions
- Ethical Injunctions
- Prices or Bindings?
- Ethics Notes
Yudkowsky's Coming of Age
- My Childhood Death Spiral
- My Best and Worst Mistake
- Raised in Technophilia
- A Prodigy of Refutation
- The Sheer Folly of Callow Youth
- That Tiny Note of Discord
- Fighting a Rearguard Action Against the Truth
- My Naturalistic Awakening
- The Level Above Mine
- Competent Elites
- Above-Average AI Scientists
- The Magnitude of His Own Folly
- Beyond the Reach of God
- My Bayesian Enlightenment
Challenging the Difficult
- The Proper Use of Humility
- Tsuyoku Naritai (I Want To Become Stronger)
- Tsuyoku vs. the Egalitarian Instinct
- Guardians of the Truth
- Guardians of Ayn Rand
- Lotteries: A Waste of Hope
- New Improved Lottery
- The Failures of Eld Science
- Something to Protect
- Einstein's Superpowers
- Trying to Try
- Use the Try Harder, Luke
- On Doing the Impossible
- Make an Extraordinary Effort
- Shut Up and Do the Impossible
The Craft and the Community
- Raising the Sanity Waterline
- A Sense That More Is Possible
- Epistemic Viciousness
- Schools Proliferating Without Evidence
- 3 Levels of Rationality Verification
- Why Our Kind Can't Cooperate
- Tolerate Tolerance
- You're Calling Who A Cult Leader?
- On Things That Are Awesome
- Your Price For Joining
- Can Humanism Match Religion's Output?
- Church vs. Taskforce
- Rationality: Common Interest of Many Causes
- Helpless Individuals
- Money: The Unit of Caring
- Purchase Fuzzies and Utilons Separately
- Selecting Rationalist Groups
- Incremental Progress and the Valley
- Whining-Based Communities
- Mandatory Secret Identities
- Beware of Other-Optimizing
- Akrasia and Shangri-La
- Collective Apathy and the Internet
- Bayesians vs. Barbarians
- Of Gender and Rationality
- My Way
- The Sin of Underconfidence
- Well-Kept Gardens Die By Pacifism
- Practical Advice Backed By Deep Theories
- Less Meta
- Go Forth and Create the Art!