Two lessons of logic

ceedings of the 7th International Joint Conference on Artificial Intelligence, Vancouver, B.C., pp. 331 -337. 1983. Natural language pmessing: crucible for computational theories of cognition. Proceedings of the 8th International Joint Conference on Artificial Intelligence, Karlsruhe. West Germany, pp. 1180-1186. SLAGLE. J R. 1971. Artificial intelligence: the heuristic programming approach. McGraw-Hill, New York, NY.