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\F0\CARTIFICIAL INTELLIGENCE LABORATORY
\CDEPARTMENT OF COMPUTER SCIENCE
\CSTANFORD UNIVERSITY
\CSTANFORD, CALIFORNIA 94305
\F1







							March 7, 1974  






Dr. Patrick Winston
MIT Room 822
545 Technology Square
Cambridge, Massachusetts 02139

Dear Erik and Pat:

\J	I have just gotten around to reading Erik's critique of Hewitt's paper.
From my superficial look at the paper, I tend to be in agreement with the review.
I think that Hewitt would benifit from having a copy of the review and that he 
could profit from Erik's criticisms in further revising his paper.  If the revising
is done successfully, then I should think that the paper would be appropriate
for the special issue.\.

\J	I am coming around to a formalism that will involve somthing like
Hewitt's actors, but there will be statements in predicate calculus about them.\.


							Best Regards,



							John McCarthy
							Director, Artificial Intelligence Laboratory
							Professor of Computer Science


cc: Dr. Erik Sandewall