Madeleine invested significant amounts of time, money, and effort while a member of a specific club. She now thinks she must continue as a member in order not to waste all that she invested. Madeleine is experiencing a sunk cost fallacy.

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The sunk cost fallacy is the tendency to continue investing resources (time, money, effort) into a project or activity because of the investments already made, even if the projected benefit or outcome is low. Madeleine's belief that she must continue as a member of the club in order not to waste her investment is a classic example of the sunk cost fallacy.

Madeleine Invested Significant Amounts of Time, Money, and Effort While