Optimal Stopping

principle

Judge quitting against the pursuit’s intended time horizon, not the discomfort of its current stretch. An early urge to stop may arrive before you have gathered enough evidence to distinguish a genuine dead end from a temporary dip.

If you chose a path that was supposed to take six years, quitting after two may be premature—not prudent. The startling claim is that you are not yet entitled to trust the feeling that it is over.

E1

Give the evidence time to mature

Long pursuits contain stretches in which effort has accumulated but results have not. Inside that gap, the present pain is vivid while the eventual payoff remains hypothetical, so quitting can feel like an evidence-based verdict even when it is mostly a reaction to the dip. Optimal stopping corrects that distortion by comparing elapsed time with the horizon you accepted at the start. The episode proposes 37 percent as a decision threshold: before roughly that share of the expected journey has passed, persistence gets the benefit of the doubt.

E1

A checkpoint is not a commandment

The threshold cannot prove that a pursuit is worthwhile; it only challenges a verdict delivered too early. New information about feasibility, harm, or changed priorities can still justify stopping. Once enough of the planned horizon has elapsed, persistence itself must face scrutiny rather than hiding behind the original commitment.

E1

Set the quitting date before the dip

For one long-term pursuit, write down its realistic total horizon and calculate the 37-percent point. Until that date, replace repeated quit-or-continue debates with a scheduled review—unless genuinely new evidence changes the case.

E1

Episodes that teach this