Want to dive into Scott Alexander's work and his thousands of blog posts? This fan website lets you sort and do semantic search through the whole codex. Enjoy!

See also Top Posts and All Tags.

Tag: rationality

Or pick a range
–
min
Blog
Only
Year
2026
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
No results found
rationality (76)
study critique (270)
book review (221)
AI (112)
economics (105)
effective altruism (105)
education (93)
creative writing (91)
debate (89)
forecasting (89)
politics (89)
prediction markets (88)
science (85)
AI safety (79)
media criticism (76)
neuroscience (76)
psychiatry (73)
psychology (72)
mental health (69)
highlights from the comments (68)
scientific research (64)
No results found
study critique (270)
book review (221)
AI (112)
economics (105)
effective altruism (105)
education (93)
creative writing (91)
debate (89)
forecasting (89)
politics (89)
prediction markets (88)
science (85)
AI safety (79)
media criticism (76)
neuroscience (76)
rationality (76)
psychiatry (73)
psychology (72)
mental health (69)
highlights from the comments (68)
Links to
No results found
domain: slatestarcodex.com (1127 posts)
domain: wikipedia.org (896 posts)
domain: astralcodexten.com (560 posts)
domain: lesswrong.com (491 posts)
domain: twitter.com / x.com (445 posts)
domain: nih.gov (333 posts)
domain: reddit.com (321 posts)
domain: amazon.com (276 posts)
domain: substack.com (268 posts)
domain: google.com (235 posts)
domain: nytimes.com (229 posts)
domain: wordpress.com (175 posts)
domain: tumblr.com (159 posts)
domain: vox.com (159 posts)
domain: washingtonpost.com (143 posts)
domain: marginalrevolution.com (140 posts)
domain: sciencedirect.com (131 posts)
domain: theguardian.com (130 posts)
subreddit: slatestarcodex (130 posts)
domain: youtube.com (128 posts)
Remember which posts I've read on this device
76 posts
Date
Length
Likes
Comments

My Heart Of Hearts

Scott discusses how moral principles emerge from the relationship between emotional responses and rational consistency, using reactions to Gaza as a central example.

acx
Jul 30, 2025 1,784 words 608 likes 1,102 comments Listen · 11 min Read Read

"But" vs. "Yes, But"

Scott explains why it's important to explicitly acknowledge when you're wrong in an argument before moving on to your next point, rather than just continuing with 'but...'

acx
Jun 12, 2025 476 words 431 likes 330 comments Listen · 5 min Read Read

Bayes For Everyone

Brandon Hendrickson presents a method to teach Bayes' theorem effectively to everyone by making it visual, intuitive, emotionally engaging, and a tool for rational discourse.

acx
May 30, 2025 4,864 words 244 likes 199 comments Listen · 30 min Read Read

Everyone's A Based Post-Christian Vitalist Until The Grooming Gangs Show Up

Scott critiques self-proclaimed moral nihilists who claim to not care about strangers' suffering, by pointing out their passionate response to the British grooming gangs scandal reveals they actually do care.

acx
Jan 23, 2025 1,625 words 625 likes 836 comments Listen · 10 min Read Read

In Continued Defense Of Non-Frequentist Probabilities

Scott Alexander defends using probabilities for hard-to-model events, arguing they aid clear communication and decision-making even in uncertain domains.

acx
Mar 21, 2024 3,438 words 262 likes 497 comments Listen · 19 min Read Read

Mantic Monday 3/11/24

The post explores recent advances in AI forecasting, discusses the concept of 'rationality engines', reviews a study on AI risk predictions, and provides updates on various prediction markets.

acx
Mar 12, 2024 4,080 words 68 likes 166 comments Listen · 29 min Read Read

Against Learning From Dramatic Events

Scott Alexander argues against significantly updating beliefs based on single dramatic events, advocating for consistent policies based on pre-existing probability distributions.

acx
Jan 16, 2024 3,919 words 309 likes 576 comments Listen · 21 min Read Read

In The Long Run, We're All Dad

Scott Alexander recounts his journey to fatherhood, blending personal experiences with broader reflections on progress, rationality, and the future his newborn twins will face.

acx
Dec 22, 2023 4,000 words 1,116 likes 447 comments Listen · 24 min Read Read

In Defense Of Describable Dating Preferences

Scott Alexander argues that describable dating preferences are valuable, despite studies suggesting otherwise, by pointing out flaws in research and emphasizing real-world evidence.

acx
Aug 16, 2023 4,885 words 221 likes 643 comments Listen · 24 min Read Read

Your Book Review: The Laws of Trading

A review of 'The Laws of Trading' by Agustin Lebron, examining trading principles and their broader applications to decision-making and life.

acx
Jul 21, 2023 6,685 words 178 likes 122 comments Listen · 36 min Read Read

Your Book Review: The Educated Mind

Kieran Egan's educational theory proposes rebuilding school curricula around five kinds of understanding to create more engaging and effective learning experiences.

acx
Jul 14, 2023 25,503 words 357 likes 420 comments Listen · 193 min Read Read

Contra Kavanagh On Fideism

Scott Alexander defends his thorough analysis of ivermectin studies, arguing that dismissing controversial topics without addressing evidence can inadvertently promote conspiracy theories.

acx
Feb 14, 2023 3,470 words 408 likes 746 comments Listen · 19 min Read Read

Absurdity Bias, Neom Edition

Scott Alexander examines the use of absurdity arguments, reflecting on his critique of Neom and offering strategies to balance absurdity heuristics with careful reasoning.

acx
Aug 4, 2022 1,990 words 89 likes 302 comments Listen · 16 min Read Read

A Guide To Asking Robots To Design Stained Glass Windows

Scott Alexander experiments with DALL-E 2 to create stained glass window designs, exploring the AI's capabilities and limitations in interpreting complex prompts.

acx
May 30, 2022 4,495 words 235 likes 287 comments Listen · 38 min Read Read

What Are We Arguing About When We Argue About Rationality?

Scott Alexander examines various interpretations of rationality, concluding it might be best understood as 'the study of study' - a meta-level examination of truth-seeking methods.

acx
Mar 4, 2022 3,496 words 180 likes 405 comments Listen · 24 min Read Read

Heuristics That Almost Always Work

Scott Alexander discusses the dangers of relying on 'Heuristics That Almost Always Work' through various examples, highlighting their limitations and potential consequences.

acx
Feb 8, 2022 2,258 words 753 likes 339 comments Listen · 18 min Read Read

There's A Time For Everyone

Scott Alexander announces his marriage and reflects on finding love, introducing 'micromarriages' as a motivational concept and exploring the rational and romantic aspects of marriage.

acx
Jan 12, 2022 2,661 words 672 likes 524 comments Listen · 20 min Read Read

Book Review: The Scout Mindset

Scott Alexander reviews 'The Scout Mindset' by Julia Galef, a book on rationality that emphasizes seeking truth over defending beliefs and addresses both intellectual and emotional aspects of clear thinking.

acx
Sep 29, 2021 5,421 words 155 likes 704 comments Listen · 38 min Read Read

Highlights From The Comments On Missing School

Scott Alexander discusses and responds to comments on his article about the effects of missing school, exploring various perspectives and reflecting on education's value and impact.

acx
Aug 26, 2021 6,239 words 81 likes 546 comments Listen · 37 min Read Read

If You Can Be Bad, You Can Also Be Good

Scott Alexander argues against the claim that 'rationality free from ideology doesn't exist', asserting that recognizing irrationality implies the existence of rationality.

acx
May 3, 2021 961 words 200 likes 501 comments Listen · 8 min Read Read

Trapped Priors As A Basic Problem Of Rationality

Scott Alexander explores the concept of 'trapped priors' as a fundamental problem in rationality, explaining how it leads to persistent biases and suggesting potential solutions.

acx
Mar 10, 2021 5,057 words 379 likes 641 comments Listen · 30 min Read Read

Mantic Monday: Judging April COVID Predictions

Scott Alexander evaluates the accuracy of COVID-19 predictions made by himself and two others in April 2020, discussing the results and their implications for forecasting.

acx
Feb 23, 2021 2,184 words 63 likes 178 comments Listen · 18 min Read Read

You're Probably Wondering Why I've Called You Here Today

Scott Alexander introduces his new blog, Astral Codex Ten, centered around the concept of ṛta and exploring topics related to rationality, science, and human cognition.

acx
Jan 21, 2021 739 words 506 likes 246 comments Listen · 6 min Read Read

What Intellectual Progress Did I Make In The 2010s?

Scott Alexander reviews his intellectual progress in the 2010s across various fields, crediting his blog for accelerating learning.

ssc
Jan 8, 2020 4,854 words 0 likes 166 comments Listen · 29 min Read Read

Mental Mountains

The post explores how emotional learning creates hard-to-update mental models, drawing parallels between psychotherapy, psychedelics, and rationality techniques in overcoming these 'mental mountains'.

ssc
Nov 26, 2019 4,789 words 0 likes 173 comments Listen · 34 min Read Read
Per page:
Showing 1 to 25 of 76 results
Get these search results in an EPUB

Your filters match 76 posts.

Posts to include
–
Leave empty to keep the defaults. Range cannot exceed 500 posts.
Download now

Generates an EPUB right now and downloads it to your device.

Send to email

Generates an EPUB in the background and emails you a temporary download link.

Your email is not shared with anyone.

Email address

To send to your Kindle, just use this link.