Decide fast when you can undo it, slowly when you can't
Jeff Bezos distinguishes one-way from two-way door decisions, Daniel Kahneman explains when fast intuition misleads, Bill Ackman stresses temperament in investing, and Ray Dalio relies on written principles. Matching decision speed to reversibility avoids both paralysis and costly mistakes.
What should determine how fast you make a decision? Show answer
How easily it can be undone. Reversible choices can be made quickly, while hard-to-reverse choices deserve slow, careful thought.
What is a two-way door in Jeff Bezos's framework? Show answer
A decision you can walk back from. If it turns out wrong, you return and choose again, so it should be made fast by an individual or small team.
What makes a decision a one-way door for Bezos? Show answer
It is so consequential and hard to reverse, or so costly and slow to undo, that it must be treated as permanent and made very deliberately.
What organizational mistake does Bezos warn about? Show answer
Using one heavyweight decision process for every choice, including the small reversible ones, which slows everything down.
What does disagree and commit mean? Show answer
When you disagree with a colleague closer to the facts, you say so, let them proceed, and then support the decision without second-guessing it.
When does Daniel Kahneman say intuition can be trusted? Show answer
Only when the environment is regular enough to predict and the person has had long practice with quick feedback, as with firefighters or chess masters.
Why does fast thinking mislead on big decisions? Show answer
It builds a confident story from the information at hand and ignores what is missing, so confidence reflects how coherent the story feels, not the quality of the evidence.
What is a premortem? Show answer
Imagining that a plan has failed a year from now and writing the history of why, to surface risks before committing.
How does Bill Ackman protect against losses he cannot recover from? Show answer
He buys at a discount large enough to be safe if he is wrong, keeps enough cash to survive market swings and does not borrow against his stocks.
What did Ackman do about a major personal decision during his worst business crisis? Show answer
He put it on hold, because he did not want to make that decision in the middle of a crisis.
What did Ray Dalio learn from his failed prediction in 1982? Show answer
To doubt his own views, seek out the smartest people who disagree with him, and never let a single decision wipe him out.
What limits does the article place on the rule? Show answer
Slow deliberation can still be overconfident, some choices only look reversible, and the sources give no formula for telling which kind of decision you face.