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Dr. J.J. Acero
Apartado 120
18080 Granada
Spain
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Dear Dr. Acero:

Thank you very much for the invitation which I would have liked to accept in order 
to interest European logicians in non-monotonic reasoning. Unfortunately, I have
a commitment for these dates. If you would like an excellent lecture covering
this material, I suggest you invite my colleague Dr. Vladimir Lifschitz, same
address.

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Sincerely,       

John McCarthy    
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JMC/ra 
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