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␈↓ ↓H␈↓␈↓βS␈↓∧ Artificial Intelligence Laboratory, STANFORD UNIVERSITY, Stanford, California 94305
␈↓ ↓H␈↓∧Telephone 415 497-4430␈↓ 	TDecember 15, 1976




␈↓ ↓H␈↓Professor Michael Dertouzos
␈↓ ↓H␈↓Laboratory for Computer Science
␈↓ ↓H␈↓M.I.T.
␈↓ ↓H␈↓545 Technology Square
␈↓ ↓H␈↓Cambridge, Massachusetts 02139

␈↓ ↓H␈↓Dear Mike:

␈↓ ↓H␈↓Here is another comment.


␈↓ ↓H␈↓Best regards,



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