The Day Explanation Stopped Proving Understanding

Institutional building with a visible foundation crack symbolizing the break between explanation and understanding

There was a day when explanation stopped proving understanding. Not a date on a calendar. A structural event — the moment AI crossed the threshold where expert-level explanation became producible without the cognitive architecture that expert-level explanation once required. Before that day, explanation was evidence. After that day, it was output. No institution marked it. The Day Explanation Stopped Proving Understanding