Sunk cost fallacy emerges when you feel compelled to finish all nineteen seasons of Grey’s Anatomy even though you lost interest long ago, because you’re two hundred episodes in and already paid the cable bill. Or when you’re sorely losing at poker and decide to say, “Fuck it,” and go all in, because you’ve put so much on the table already and couldn’t live with yourself if you folded. The bias is tied to loss aversion, humans’ spiritual allergy to facing defeat.
