This market will resolve to "Yes" if a 51% attack is successfully carried out on the Bitcoin blockchain at any point between the deployment date of this market and January 1st 2027 - 00:00 PST. Otherwise, this market will resolve to "No." For the purpose of this market, a "51% attack" is defined as one of the following incidents: - Double-spend: Reverse transactions made, allowing an attacker to spend the same coins more than once. - Reorg blocks: Remove or reorganize previously confirmed blocks, or the sequence of transactions in previous blocks, from the blockchain's history.