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





							March 7, 1974  





Dr. Erik Sandewall
Datalogilaboratoriet
Institutionen For Informationsbehandling
Uppsala Universitet
Sturegatan 1
752 23 Uppsala, Sweden

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. Patrick Winston