The planning fallacy is systematically underestimating how long tasks will take and how much they'll cost — even after the exact same thing burned you before. Examples:
What is the planning fallacy? Read the full idea →...that quietly run for months.
Teams confidently set a date, then miss it by half again — every release.
...that somehow swallows your whole morning.
Bridges, stadiums, and railways routinely land years late and billions over budget.
The essay, the taxes, the report — begun late and finished at the deadline, despite last year's identical scramble.
That's just how memory works. Lock the planning fallacy in with a 5-minute active-recall session — spaced repetition, no signup.
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