The confirmation error is also known as the sunk-cost fallacy.

The confirmation error is not the same as the sunk-cost fallacy. The confirmation error refers to the tendency for people to seek out and remember information that confirms their pre-existing beliefs or hypotheses, while disregarding or downplaying information that does not fit. The sunk-cost fallacy, on the other hand, is the tendency for people to continue investing time, money, or resources into a project or decision because of the amount already sunk into it, even if the project is no longer feasible or profitable.