task_categories:text-generation language:en language:zh language:fr language:it language:es language:pt language:ja language:ko language:ru license:apache-2.0 size_categories:10K<n<100K format:json modality:document modality:text library:datasets library:pandas library:polars library:mlcroissant arxiv:2602.14469 region:us synthetic reasoning reverse-cot post-hoc-rationalization distillation