This market predicts whether a nuclear weapon will be used in 2023. A successful use will occur if a nuclear device detonates anywhere on Earth between May 22 and December 31, 11:59:59 PM ET, including tests and accidents. However, the use of a nuclear weapon that fails to detonate or is part of an experiment are not considered successes for this market. The resolution criteria rely on credible reporting, with confirmation of a successful detonation being sufficient to resolve to "Yes". A determination of whether a detonation was nuclear will also be made based on credible reporting.