Cyc: The $200M AI That Never Was

This essay details the 40-year history of Cyc, Douglas Lenat's ambitious project to build artificial general intelligence (AGI) by scaling symbolic logic. Despite a $200 million investment and 2000 person-years of effort, Cyc failed to achieve intellectual maturity. The article unveils its secretive history, highlighting the project's insularity and rejection of alternative AI approaches as key factors contributing to its failure. Cyc's long, slow demise serves as a powerful indictment against the symbolic-logic approach to AGI.