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␈↓ ↓H␈↓␈↓βS␈↓∧ Artificial Intelligence Laboratory, STANFORD UNIVERSITY, Stanford, California 94305
␈↓ ↓H␈↓∧Telephone 415 497-4430␈↓ 	oOctober 25, 1976




␈↓ ↓H␈↓Editorial Dept.
␈↓ ↓H␈↓National Review
␈↓ ↓H␈↓150 East 35th St.
␈↓ ↓H␈↓New York, N.Y. 10016

␈↓ ↓H␈↓Gentlemen:

␈↓ ↓H␈↓        The enclosed is submitted for publication under your customary conditions.


␈↓ ↓H␈↓Sincerely,



␈↓ ↓H␈↓John McCarthy
␈↓ ↓H␈↓Director
␈↓ ↓H␈↓Professor of Computer Science