Copilot writes, Claude explains, ChatGPT plans. Productivity is up but what is actually happening to your thinking? Picture this: you get a bug report. You open your AI assistant, describe the problem, get a solution, read it through, it sounds plausible you take it. Done. Commit pushed. Ticket closed. And now the honest question: did you actually understandthe problem? Or did you just solve it? There is a subtle but critical difference. And that difference has a name: cognitive debt . Not a bug in the code. A bug in the head. Reading is not understanding. Confirming is not knowing. Agreement is no substitute for genuine engagement The Illusion That Feels Like Competence I read that this phenomenon is known for decades: the so-called Illusion of Knowing . You read something, it sounds right, you nod to yourself and your brain signals “understood.” But it hasn't stored anything. It hasn't made any connections. It hasn't really learned anything.…