Why Sunk Costs Feel Like Reasons to Keep Going

Opens with a vivid scenario: you've booked a non-refundable weekend that turns out to be miserable. Logically, the money is gone whether you stay or leave. Yet you suspect you'll tough it out. The slide frames the driving question without answering it.

• Past spending feels like it ought to matter — but math says it shouldn't
• Why does the closed chapter reopen as a future argument?

One forced-choice question that captures the core tension before any evidence appears. The learner commits publicly to a cause.

• Pin the learner's hunch before the mechanics are revealed
• Surface that this is a choice between reason-based and feeling-based causes

A side-by-side scenario widget. Left panel: 'You paid $200 for the ticket.' Right panel: 'Your friend paid $200 for the ticket.' Same weather, same miserable weekend ahead. Sliders let the learner adjust how 'wasted' the loss feels, then reveal whether each person decides to go. Demonstrates that the identical future is judged differently when the loss is personally owned.

• Identical future + different past ownership = different choices
• The loss moves from 'past tense' to 'present threat' when it's yours

Summarizes three experimental findings: (1) Arkes & Blumer's theater-ticket study, (2) the escalation-of-commitment literature on failing projects, (3) Bem's self-perception evidence that effort inflates liking. Static comparison of conditions and outcomes, no answer yet.

• People use a non-refundable ticket more than a free one — even when they don't want the show
• Failing projects get more funding, not less, as prior investment grows
• Effort spent on something raises its perceived value

Names and defines the three mental moves: (1) Loss framing — the closed loss reactivates as a present threat if you quit; (2) Effort justification — sweat already poured in becomes evidence that the thing is worth it; (3) Identity commitment — 'I am the kind of person who finishes this' makes quitting a self-betrayal. Each trick converts past cost into forward-looking reason.

• Loss framing relocates yesterday's bill into tomorrow's risk
• Effort justification transforms time into meaning
• Identity commitment turns quitting into a vote against the self

A short scenario widget where the learner applies the three tricks to a fresh case: a friend who has spent two years on a graduate program they now hate. The learner tags which trick is operating in each of the friend's statements, then sees whether their tagging predicts the friend's actual behavior.

• Recognize loss framing, effort justification, and identity commitment in real talk
• Predict the behavior these tricks tend to produce

Marks where the heuristics fail and where they help. Sometimes persistence built on sunk cost is genuinely wise (relearning a skill after a steep upfront cost; staying in a relationship through a rough patch); sometimes the tricks are pure self-deception. The line is whether more investment genuinely improves future payoff.

• Heuristics can be calibrated, not just errors
• The honest question is 'does more effort change the future?', not 'have I already paid?'

Directly answers the driving question. The three mental tricks are: loss framing turns a closed bill into a live threat, effort justification turns past sweat into present meaning, and identity commitment turns quitting into self-betrayal. Together they manufacture future-looking reasons from past-looking facts — and the way to outmaneuver them is to ask the one question they cannot answer.

• Sunk costs persist as forward reasons because the mind retcons them, not miscalculates them
• The single disarming question: 'If I weren't already in, would I enter now?'