Fallacy Quote by Daniel Kahneman
““This should not come as a surprise: overly optimistic forecasts of the outcome of projects are found everywhere. Amos and I coined the term planning fallacy to describe plans and forecasts that are unrealistically close to best-case scenarios could be improved by consulting the statistics of similar cases Examples of the planning fallacy abound in the experiences of individuals, governments, and businesses.””
About This Quote
Source Article: Thinking, Fast and Slow, Daniel Kahneman, 2011
People tend to underestimate how long tasks will take and how much they will cost, because they focus on best‑case scenarios rather than realistic data.
In simple terms: Optimistic predictions ignore past data.
Key Takeaway
Check past similar projects before planning.
Themes
cognition
bias
decision‑making
planning
risk
Mood
cautious
analytical
Type
advisory
educational
When to use this quote
- project management
- personal budgeting
- policy making
- business strategy
Key Concepts
planning fallacy
optimism bias
statistical reasoning
Questions to Reflect On
- How can you incorporate realistic data into your forecasts?
- When is optimism beneficial versus harmful?
A Different Perspective
Optimism can be useful for motivation, but may lead to costly overruns if unchecked.
