Thinking, Fast and Slow
What you see is all there is
Nothing announces the missing information
Thinking, Fast and Slow, chapter 7
Kahneman gave the mind's largest defect an acronym. This page is about why ignorance produces no sensation at all.
What actually happened?
He named it WYSIATI: what you see is all there is. The fast, associative part of the mind builds the most coherent story available out of whatever material is to hand, and never enquires about what is missing. Confidence then reads off the smoothness of that story rather than the amount or quality of evidence behind it, which is why less information often produces more certainty. There is less to contradict. He was careful, too, that System 1 and System 2 are fictitious characters, not departments you can address.
Certainty measures coherence, not evidence
The feeling of being sure is a reading of narrative fit, not of proof. Three facts that happen to form a causal chain generate more conviction than ten that conflict. So weigh a judgement by counting what stands behind it, never by its tone.
Twenty minutes with a candidate and the interviewer just knows. Twenty minutes is exactly little enough to assemble an impression with no contradictions in it.
Nothing in you flags the gap
There is no internal alarm for what you have not seen. The story simply closes over the hole. The repair has to come from outside: a fixed list forcing you to name what this decision needs, what you hold, and how the missing pieces would change the answer.
Add one line to the template: key information not yet obtained. It usually fills with three items, and one of them turns the decision around.
Whatever arrives first becomes the foundation
Because the story is assembled from what is present, the earliest information lays the foundations and later evidence can only be fitted around them. The order of reporting is therefore a form of power. Whoever speaks first has framed it for everybody.
In a serious dispute the side heard first usually wins. Have both put it in writing, submitted at the same time, and opened together.
How do I use it today?
Where you are: you feel very sure about a judgement.
Ask first: is the certainty coming from the quantity of evidence or the smoothness of the story? Can you name three things this judgement is missing?
Where it goes wrong: treating never having complete information as a reason never to decide, or running the audit only on other people's confidence.
Lines to keep
What you see is all there is.
A remarkable aspect of your mental life is that you are rarely stumped.
Naming which system is speaking does not stop it speaking.
Same situation, other people are asking
Can I trust what my gut is telling me this time?Everyone in the room agrees. I don't. Am I seeing something or just being difficult?The model's answer and my instinct disagree. Do I override it?It all fits together. Is that evidence or is that a story?Do I trust my gut · all 4 questions →If this one named what you are going through,
send it to someone who needs it, or keep it somewhere you will find it again.