This can be a problem (fallacy) when these previous losses influence you to make a bad decision. An instance where sunk costs lead to an escalation of commitment is sometimes called the Concorde fallacy, named after the supersonic jet whose development program was plagued with prohibitive cost overruns and never came close to making a profit. Ask yourself: Is my project like the Concorde? Am I throwing good money after bad when it is better to just walk away?
