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Merry Christmas! Today I turn an earlier LW shortform into a full post and discuss "unknown knowns" "obvious" ideas that are actually hard to discuss…

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Do You Know What I Know?
14 Oct 2025
newyorker.com

Joshua Rothman writes about common knowledge and the book “When Everyone Knows That Everyone Knows . . .,” by Steven Pinker.

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Enhance Decision-Making With Control Systems
17 Jul 2025
spectrum.ieee.org

Master the art of decision-making with insights from control engineering. Learn how mental models can guide you through uncertainty.

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67 Logical Fallacies Explained in 11 Minutes
11 Apr 2024
openculture.com

Fallacies—notes Purdue's Writing Lab—'are common errors in reasoning that will undermine the logic of your argument. Fallacies can be either illegitimate arguments or irrelevant points, and are often identified because they lack evidence that supports their claim.

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Mental Models
29 Feb 2024
nngroup.com

What users believe they know about a user interface impacts how they use it. Mismatched mental models are common, especially with designs that try something new.

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How To Prove Prevention Works
19 Feb 2024
theness.com

Homer: Not a bear in sight. The Bear Patrol must be working like a charm. Lisa: That’s specious reasoning, Dad. Homer: Thank you, dear. Lisa: By your logic I could claim that this rock keeps tigers away. Homer: Oh, how does it work? Lisa: It doesn’t work. Homer: Uh-huh. Lisa: It’s just a stupid rock.

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Business models based on the compiled list at http://news.ycombinator.com/item?id=4924647. I find the link very hard to browse, so I made a simple version in Markdown instead. · GitHub

Tools for better thinking | Untools
10 Feb 2024
untools.co

Collection of thinking tools and frameworks to help you solve problems, make decisions and understand systems.

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Distinctive meanings for a word like “risk” can have a big impact on public messaging, especially when it comes to issues like climate change

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Here’s some good news: You can train your brain to think faster and work smarter.

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When should you hold 'em and when should you fold 'em? Use this set of decision-making tools to help you identify when it’s time to move on and find the courage to do so.

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8 mental model design heuristics
21 Aug 2022
uxdesign.cc

Rules of thumb for producing learnable designs

Medium
19 Jul 2022
medium.com
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Here’s some good news: You can train your brain to think faster and work smarter.

Mental models
18 Jul 2022
defmacro.org

These are some mental models I find useful. They’re rooted in decades of experience of thousands of experts – a modern equivalent of folk wisdom. Mental models are useful to quickly and correctly reason about seemingly intractable problems. They require quite a bit of intuition to properly internalize, but once you’ve internalized them they’re relatively easy to apply. They’re also easy to forget in the moment – use this post as a checklist when thinking about complex problems.

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Inversion is a powerful mental model to improve your thinking because it helps you identify and remove obstacles to success. Most of us tend to think one way about a problem: forward. Inversion allows us to flip the problem around and think backward.

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Understand the world and make better decisions using concepts from psychology, philosophy, economics and other disciplines, delivered straight to your inbox every Sunday.

Medium
18 Jul 2022
medium.com
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The smartest people in the world use mental models to make intelligent decisions, avoid stupidity, and increase productivity. Let's take a look at how ...

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“Deliver to the world what you would buy if you were on the other end."

Essential Japanese: The Mental Model [pdf]
3 Feb 2021
japanesecomplete.com

Essentials Guide to Japanese: The Mental Model by Japanese Complete. Master Japanese, get started for free.

Patterns — Gordon Brander
4 Jan 2021
gordonbrander.com

This is my bag of tricks — loose notes, design patterns, rules-of-thumb, tools, cheatsheets, gimmicks, leverage points, descriptions of systems, key questions, risks, and unknowns.

Bookshelf — Gordon Brander
3 Jan 2021
gordonbrander.com
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When you're faced with uncertainty, the best thing you can do is analyse your inputs, synthesise a new model, and then destroy it to start over again.

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Curious about product design at Dropbox? Here’s a look at tools we use for solving problems, making decisions, and communicating ideas.

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Leverage mental models to think better. First Principles Thinking is an excellent model for critical thinking. This post looks at how to practice First Principles Thinking with lots of examples.

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Organizations are awash in data — from geocoded transactional data to real-time website traffic to semantic quantifications of corporate annual reports. All these data and data sources only add value if put to use. And that typically means that the data is incorporated into a model. The most sophisticated organizations — from Alphabet to Berkshire Hathaway to the CIA — all use models. In fact, they do something even better: they use many models in combination. But creating an “ensemble” of models isn’t just about picking the ones that perform best on their own. You want to combine models that complement one another. Three rules can help you construct your own powerful ensemble of models: spread attention broadly, boost predictions, and seek conflict.

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Mental models affect how we see problems and people. Depending on how you use them, mental models can be incredibly constructive or destructive.

L
10 Jun 2018
l.facebook.com
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2019 UPDATE: Since this post came out, I co-authored a book about it called Super Thinking: The Big Book of Mental Models.

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Every one of us make dozens, if not hundreds of small to big decisions on a daily basis. Some don’t impact our lives at all, while some can change the outcome of our entire lives. Whether it’s trying to figure out which job you should take,

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Here’s some good news: You can train your brain to think faster and work smarter.