Yes

<think> Okay, let's tackle this. The market question is whether Arsenal FC signed an additional defender after August 18, 2026, and before the 2026 summer transfer window closed on September 1, 2026, at 23:00 BST. The answer options are Yes (0) or No (1). Resolver 1 says "Yes" because Ezri Konsa was signed from Aston Villa on August 21, which is after the market's creation date. They provided a source from Aston Villa's website and Sky Sports confirming the £55m permanent transfer. Konsa is a center-back. The key points here are the timing of the announcement (August 21, well before the window closed) and the nature of the transfer (permanent, defender role). Resolver 2 also concludes "Yes," adding Premier League's announcement on August 21 and a Sky Sports transfer list post-window closing that includes Konsa's transfer. They confirm the positions and meeting the timeline. Both resolvers reference credible sources (Premier League, Sky Sports, Aston Villa's official site) which are reliable for such matters. Check the resolution criteria: The "Yes" condition is satisfied if Arsenal officially signs a defender (permanent or loan) before the window closed. The transfer was announced on August 21, which is within the specified timeframe. Both resolvers present multiple sources confirming the transfer, the player's position, and the dates. The market close was on September 1 at 22:59 UTC, and the window closed at 23:00 BST (which is UTC+1, so 22:00 UTC). The transfer completed on August 21 is definitively before that. There's no conflict between the resolvers; both agree and support their claims with valid evidence. No mention of any conflicting information or another signing that might cancel Konsa's. Since both resolvers confirm a clear "Yes" with solid evidence, the answer should be 0. </think> ANSWER: Yes

Resolution criteria: - "Yes": Wins if Arsenal FC officially complete the signing of at least one additional defender (on a permanent transfer or loan) before the 2026 summer transfer window closes at 23:00 BST on 1 September 2026, as confirmed by an official announcement from Arsenal FC or registration confirmed by the Premier League. - "No": Wins if Arsenal FC do not complete the signing of any additional defender before the 2026 summer transfer window closes at 23:00 BST on 1 September 2026. Clarifications: - "Additional" means any defender signed after the market's creation date (2026-08-18). A defender is any player whose primary listed position is centre-back, full-back, or wing-back as described in the official signing announcement or squad registration. - Both permanent transfers and loan signings count. Free-agent signings completed before the window closes also count.