Patrick John Hayes (born 21 August 1944) is a British computer scientist who lives and works in the United States.
After leaving Edinburgh in 1973, Hayes held an academic appointment in the Department of Computer Science at the University of Essex (1973-80).
In 1985, he left Rochester for California, to join the Schlumberger Palo Alto Research Center (1985-87), Xerox-PARC (1987-90) and the Microelectronics and Computer Technology Corporation (1991 -92), where he was Director of the CYC-West project.
[13][14] Hayes next major contribution was the seminal work on the Naive Physics Manifesto,[2] which anticipated the expert systems movement in many ways and called for researchers in AI to actually try to represent knowledge in computers.
Hayes has served as secretary of AISB (1968-79), chairman and trustee of IJCAI (1980-84), associate editor of the Artificial Intelligence Journal (1979-86), a governor of the Cognitive Science Society (1983-86) and president of AAAI (1991-93).