Card: explain what "verified" means

README.md

@@ -68,6 +68,8 @@ dataset_info:
 
 A filtered copy of the Arabic (`ar`) subset of **MMLU-ProX**, the multilingual extension of MMLU-Pro (multiple-choice questions with up to ten options across 14 categories), with test samples flagged by a multi-judge audit removed. One config, `ar`, with a `test` split (audited and filtered) and a `validation` split (not audited, unchanged).
 
+> **What "verified" means.** Samples were removed when all three LLM judges flagged a significant defect. This is not a human review, and only samples that baseline models answered incorrectly were audited, so some defects may remain in the kept data.
+
 ## Source
 - Original dataset: [`li-lab/MMLU-ProX`](https://huggingface.co/datasets/li-lab/MMLU-ProX), revision `8e6106a6c6ce1c5027e66cc338143cf997b2aa09` (files `ar/test-00000-of-00001.parquet` and `ar/validation-00000-of-00001.parquet`; both files are byte-identical at every upstream revision since `a310c4b24c87ea26db08bb62d4cc87c0fbaf7025`).
 - Only the Arabic (`ar`) config is included; the other languages of MMLU-ProX are not part of this copy.