SCRuB: Social Concept Reasoning under Rubric-Based Evaluation. - Jamelle Watson-Daniels; Himaghna Bhattacharjee; Skyler Wang; Brandon Handoko; Antonio Li; Anaelia Ovalle; Mahesh Pasupuleti; Candace Ross; Vidya Sarma; Arjun Subramonian; Karen Ullrich; Will van der Vaart; et al. (CoRR, 2026)