Oxford and Cambridge alumnus Harish Natarajan defeated IBM's AI in a live public debate on Monday in San Francisco, US. Natarajan, who holds the record for most championship victories, debated 'subsidising preschools' with the six-year-old system named 'Project Debater', having a 10-billion sentence database. "There will come a point soon where AI will be better than humans," Natarajan said.