Shane Mueller Awarded DARPA Explainable Artificial Intelligence (XAI) Grant Published April 24, 2017 By Karen Johnson CLS DARPA HCC Mueller Shane Mueller Shane Mueller (CLS/HCC) was awarded DARPA’s Explainable AI (XAI) Grant to develop naturalistic theories of explanation with AI systems and a computational cognitive model of explanatory reasoning. This is a four-year grant in the amount of $808,450.