Erik Mueller is a Research Staff Member at IBM Watson Group and IBM Research. He is a member of the IBM team that developed Watson, a natural language question answering system that won a two-game Jeopardy! match against two Jeopardy! grand champions. His books include Commonsense Reasoning, Daydreaming in Humans and Machines, and Natural Language Processing with ThoughtTreasure. He received an S.B. in Computer Science and Engineering from the Massachusetts Institute of Technology and an M.S. and Ph.D. in Computer Science from the University of California, Los Angeles. He is currently developing WatsonPaths, a reasoning system based on Watson, and Watson for Healthcare, which will help healthcare professionals diagnose, treat, and manage patients.