The Concept of the Sunk Cost

Petri: There is one absolute path to failure, every time. Not recognizing a failure when you see it. A concept in business called the sunk cost. When you invest money in a project, it loses and because you're so emotionally invested in it, your emotions take over. And despite the project failing and failing and failing, the stock going down and down and down, you continue to invest like an addicted gambler. Sir, you're a hundred thousand in debt. You've just seckoned mortgage your home to play bocharad or whatever. What is this? National pulse. He hat tip, national pulse.