HN Atlas
← All topics

Reasoning, decisions, and cognitive bias

Critical thinking, probability, judgment, behavioral biases, and decision-making under uncertainty.

14,510 stories · 208 in 30 days · Updated Sep 28, 2026

The pace of conversation

Posts per month

2020-01: 194 posts2020-02: 166 posts2020-03: 157 posts2020-04: 162 posts2020-05: 204 posts2020-06: 241 posts2020-07: 232 posts2020-08: 214 posts2020-09: 149 posts2020-10: 191 posts2020-11: 190 posts2020-12: 177 posts2021-01: 157 posts2021-02: 146 posts2021-03: 167 posts2021-04: 167 posts2021-05: 171 posts2021-06: 160 posts2021-07: 139 posts2021-08: 191 posts2021-09: 141 posts2021-10: 160 posts2021-11: 157 posts2021-12: 160 posts2022-01: 215 posts2022-02: 174 posts2022-03: 140 posts2022-04: 176 posts2022-05: 158 posts2022-06: 173 posts2022-07: 156 posts2022-08: 194 posts2022-09: 195 posts2022-10: 200 posts2022-11: 162 posts2022-12: 182 posts2023-01: 194 posts2023-02: 159 posts2023-03: 191 posts2023-04: 173 posts2023-05: 174 posts2023-06: 173 posts2023-07: 188 posts2023-08: 197 posts2023-09: 143 posts2023-10: 172 posts2023-11: 170 posts2023-12: 166 posts2024-01: 229 posts2024-02: 191 posts2024-03: 159 posts2024-04: 178 posts2024-05: 173 posts2024-06: 167 posts2024-07: 176 posts2024-08: 197 posts2024-09: 188 posts2024-10: 189 posts2024-11: 170 posts2024-12: 193 posts2025-01: 172 posts2025-02: 153 posts2025-03: 201 posts2025-04: 174 posts2025-05: 198 posts2025-06: 170 posts2025-07: 168 posts2025-08: 159 posts2025-09: 167 posts2025-10: 180 posts2025-11: 166 posts2025-12: 171 posts2026-01: 177 posts2026-02: 201 posts2026-03: 201 posts2026-04: 174 posts2026-05: 192 posts2026-06: 194 posts2026-07: 228 posts2026-08: 244 posts2026-09: 192 posts
2020-012026-09

Posts per month · first and latest months may be partial.

01 / EXPLORE THROUGH TIME

Timeline

Start with the latest. Scroll back through time, or zoom in for more.

Year by yearUp to 5 stories per year
20261,803 stories
98% isn't much↗ whynothugo.nl · HN · 350 comments · 526 points · Jul 07, 2026
What Is a Dickover?↗ daringfireball.net · HN · 205 comments · 558 points · May 29, 2026
Is my blue your blue? (2024)↗ ismy.blue · HN · 469 comments · 694 points · Apr 27, 2026
Willingness to look stupid↗ sharif.io · HN · 255 comments · 764 points · Mar 09, 2026
Decision trees – the unreasonable power of nested decision rules↗ mlu-explain.github.io · HN · 82 comments · 558 points · Mar 01, 2026
20252,079 stories
Why aren't smart people happier?↗ theseedsofscience.pub · HN · 622 comments · 530 points · Nov 05, 2025
Cognitive load is what matters↗ github.com · HN · 522 comments · 1582 points · Aug 30, 2025
The Illusion of Thinking: Strengths and limitations of reasoning models [pdf]↗ ml-site.cdn-apple.com · HN · 270 comments · 488 points · Jun 06, 2025
The curse of knowing how, or; fixing everything↗ notashelf.dev · HN · 441 comments · 1197 points · May 06, 2025
Show HN: Unsure Calculator – back-of-a-napkin probabilistic calculator↗ filiph.github.io · HN · 162 comments · 930 points · Apr 15, 2025
20242,210 stories
Cognitive load is what matters↗ minds.md · HN · 721 comments · 1769 points · Dec 22, 2024
Test↗ defense.gov · HN · 145 comments · 608 points · Dec 13, 2024
You are not dumb, you just lack the prerequisites↗ lelouch.dev · HN · 403 comments · 760 points · Aug 24, 2024
Guess my RGB↗ susam.net · HN · 144 comments · 618 points · Mar 31, 2024
Is something bugging you?↗ antithesis.com · HN · 418 comments · 1179 points · Feb 13, 2024
20232,100 stories
How random is xkcd? (2015)↗ hardmath123.github.io · HN · 128 comments · 209 points · Dec 28, 2023
Veritasium: The SAT Question Everyone Got Wrong [video]↗ youtube.com · HN · 242 comments · 280 points · Dec 26, 2023
Bayesians moving from defense to offense↗ statmodeling.stat.columbia.edu · HN · 135 comments · 213 points · Dec 23, 2023
Have Attention Spans Been Declining? – Yes, 65%↗ slimemoldtimemold.com · HN · 47 comments · 97 points · Jul 24, 2023
Legacy and Athlete Preferences at Harvard (2020) [pdf]↗ public.econ.duke.edu · HN · 110 comments · 161 points · Jun 30, 2023
20222,125 stories
How fateful?↗ chan.co.za · HN · 331 comments · 1120 points · Oct 04, 2022
IBM's Asshole Test↗ johnpublic.mataroa.blog · HN · 577 comments · 683 points · May 04, 2022
We think this cool study we found is flawed. Help us reproduce it↗ pudding.cool · HN · 343 comments · 704 points · May 01, 2022
Are you a baby? A litmus test↗ haleynahman.substack.com · HN · 309 comments · 660 points · Apr 04, 2022
Heuristics that almost always work↗ astralcodexten.substack.com · HN · 520 comments · 1000 points · Feb 08, 2022
20211,916 stories
Swedish study finds discrimination against men in female-dominated occupations↗ psypost.org · HN · 273 comments · 433 points · Nov 19, 2021
Willingness to look stupid↗ danluu.com · HN · 777 comments · 1859 points · Oct 21, 2021
It is easier to educate a Do-er than to motivate the educated↗ twitter.com · HN · 213 comments · 446 points · Oct 05, 2021
Win at Risk by using systems thinking↗ thesystemisdown.substack.com · HN · 237 comments · 412 points · Jun 12, 2021
How can you tell if someone is lying?↗ theatlantic.com · HN · 345 comments · 421 points · Mar 28, 2021
20202,277 stories
Do You Love Me? [video]↗ youtube.com · HN · 452 comments · 1218 points · Dec 29, 2020
Social Cooling (2017)↗ socialcooling.com · HN · 1059 comments · 2692 points · Sep 29, 2020
Procrastination is driven by our desire to avoid difficult emotions, says expert↗ cbc.ca · HN · 312 comments · 613 points · Jun 16, 2020
When in doubt: hang up, look up, and call back↗ krebsonsecurity.com · HN · 347 comments · 734 points · Apr 23, 2020
An alternative argument for why women leave STEM↗ medium.com · HN · 700 comments · 629 points · Jan 17, 2020
Scroll through time ↕

02 / CATCH UP

The conversation now

Popular stories, with attention fading over roughly two weeks.

The Test↗ tante.cc · HN · 89 comments · 168 points · Sep 25, 2026
Show HN: JevBench, a reproducible benchmark for typed decision models↗ benchmarkheaven.com · HN · 39 comments · 151 points · Sep 22, 2026
Evidence of Fraud in an Influential Study About Procrastination↗ datacolada.org · HN · 277 comments · 365 points · Aug 31, 2026
Jev Can't Be Calibrated↗ alexmolas.com · HN · 61 comments · 65 points · Sep 23, 2026
Fool's Expertise↗ bcantrill.dtrace.org · HN · 22 comments · 36 points · Sep 28, 2026

03 / GO DEEPER

Follow your curiosity

Find a particular story, revisit a year, or see what resonated.

Highest rated · the last 30 days

Evidence of Fraud in an Influential Study About Procrastination↗ datacolada.org · HN · 277 comments · 365 points · Aug 31, 2026
Calibrate Before You Accelerate: Bias Toward Action in a New Role↗ tucker.wales · HN · 80 comments · 188 points · Aug 29, 2026
The Test↗ tante.cc · HN · 89 comments · 168 points · Sep 25, 2026
Show HN: JevBench, a reproducible benchmark for typed decision models↗ benchmarkheaven.com · HN · 39 comments · 151 points · Sep 22, 2026
Ask HN: Would you read a statistics textbook?↗ news.ycombinator.com · HN · 67 comments · 109 points · Sep 06, 2026
Higher social class predicts increased unethical behavior↗ pnas.org · HN · 56 comments · 103 points · Sep 04, 2026
The pencil case model of creativity↗ dub.uu.nl · HN · 22 comments · 69 points · Sep 06, 2026
Jev Can't Be Calibrated↗ alexmolas.com · HN · 61 comments · 65 points · Sep 23, 2026
Fool's Expertise↗ bcantrill.dtrace.org · HN · 22 comments · 36 points · Sep 28, 2026
People who know the most often sound the least certain↗ vrash.substack.com · HN · 16 comments · 35 points · Sep 19, 2026

10 stories shown.

Help shape Hacker Atlas

Useful, confusing, or missing something? I’d love to hear.

Your feedback is private. Your email is only used to reply, never to sign you up for a newsletter.