TY - CHAP T1 - Boderline Cases of Ill-definedness - and How Different Definitions Deal with Them AU - Ashley, K. D. AU - Lynch, C. AU - Pinkwart, N. AU - Aleven, V. TI - Proceedings of the Workshop on Intelligent Tutoring Systems for Ill-Defined Domains at the 10th International Conference on Intelligent Tutoring Systems (ITS) PY - 2010 ER -