BOOK QUESTION: Thinking, fast and slow What does the author mean by “WYSIATI”? Select only one.

Question

BlackTom AI · Accepted Answer

WYSIATI stands for “What You See Is All There Is” — the idea that people form judgments based only on the information that is currently available, neglecting missing or unknown information.

1) Relevant knowledge points and concepts
- Origin: Daniel Kahneman’s Thinking, Fast and Slow; tied to System 1 (fast, intuitive) thinking.
- Key features: reliance on readily available evidence, construction of a coherent story, neglect of absent data (base rates, alternative hypotheses).
- Consequences: overconfidence, misestimation of probabilities, susceptibility to availability and representativeness biases.

2) Step-by-step reasoning process
- Step 1: System 1 receives a small set of salient facts or a vivid description.
- Step 2: It rapidly creates an explanation or judgment from just that input, assuming completeness.
- Step 3: Because missing information is ignored, the judgment is made as if no other facts could change it.
- Step 4: This leads to confident but often biased decisions (e.g., ignoring base rates or alternative causes).

3) Calculations / intermediate steps
- No numerical calculations are required for this conceptual question.

4) Why the correct answer is correct
- Option b states that people make judgments based solely on readily available information while ignoring information that isn’t immediately present. This is a direct restatement of “What You See Is All There Is.” It captures the core mechanism Kahneman highlights: inferred completeness from limited data and the resulting errors.

5) Why the other options are incorrect
- Option a describes inter-rater variability (leniency/harshness) in professional judgments — a different phenomenon, not WYSIATI.
- Option c describes the relationship between income and well-being (a plateau effect), which appears elsewhere in research but is not the meaning of WYSIATI.

6) Conclusion
- Therefore, option b is correct. This matches the provided answer: “People tend to make judgments and decisions based solely on the information readily available to them, while ignoring or underestimating the information that is not immediately present.”

BOOK QUESTION: Thinking, fast and slow What does the author mean by “WYSIATI”? Select only one.Single choice

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