Thinking, Fast and Slow
- 2011
- Trade paperback, 2013
- paperback
- Farrar, Straus and Giroux (Macmillan US)
- 9780374533557
AskNex reference artwork. The publisher's cover appears only under an approved rights record.
by Daniel Kahneman
Two systems of thought, and a catalogue of the predictable ways the fast one misleads the slow one.
Explains why more thinking rarely fixes a decision made by intuition.
AskNex explains and applies the ideas in this book in its own words. Nothing on this page is quoted from the book, and the page does not stand in for it: the argument, the evidence and the voice are the author's, and reading the original remains the deeper path.
The core idea
Intuition is fast, confident and frequently wrong in specific, repeatable ways. Good decisions come from designing around that, not from trying harder.
The ideas
3 mental models, in the order they build on each other.
- 01
System 1 / System 2
Automatic judgement versus effortful reasoning, and the handoff between them.
- 02
Loss aversion
Losses register roughly twice as heavily as equivalent gains.
- 03
Base rates
Vivid stories displace the statistics that would predict better.
What the book argues
AskNex's own paraphrases of the positions this book takes, as they are held in the knowledge graph. Not quotations, and not the whole book.
Any number placed on the table anchors the judgements that follow, even when it is arbitrary.
A loss is felt roughly twice as strongly as a gain of the same size.
Faced with a hard question, the mind quietly answers an easier one instead.
Simple rules and outside-view base rates beat expert intuition in noisy domains.
Cognitive bias
Fast intuitive judgement is efficient and predictably wrong in known ways.
Loss aversion
Losses register more heavily than equivalent gains, distorting risk-taking.
Deciding under uncertainty
Choosing well when information is incomplete and reversible bets are cheap.
Thinking in probabilities
Judging a decision by its expected value over a series, not by the outcome of one instance.
Risk and uncertainty
How people mis-estimate downside, and what survivable plans look like.
Emotional regulation under pressure
Recognising the state that drives a bad decision before it drives the next one.
What actually matters
- Awareness of a bias rarely removes it; structure does.
- Checklists and pre-mortems outperform confidence.
Where it applies
Practical moves the book supports. Each one is a place to start, not a rule.
- Pre-mortem
Assume the decision failed. Write the reasons before committing.
- Use base rates
Start from what usually happens, then adjust.
Questions worth asking
What would the outside view say about this?
Am I reasoning, or recognising a pattern?
Problems this book speaks to
Recurring situations where this book is one of the sources AskNex draws on. Each opens a public orientation page.
What are you trying to figure out right now?
AskNex will answer your situation using the ideas in Thinking, Fast and Slow alongside every other source that applies — including the ones that argue against it.