critique of Cyc, one starting point could be the paper:

Mahesh, Kavi, Sergei Nirenburg, Jim Cowie &amp; David Farwell (1996) An
assessment of Cyc for natural language processing. MCCS-96-302, Computing
Research Laboratory, New Mexico State University, Las Cruces, New Mexico.
Available at
<A  HREF="http://crl.nmsu.edu/Research/Pubs/MCCS/Abstracts/mccs-96-302.htm">http://crl.nmsu.edu/Research/Pubs/MCCS/Abstracts/mccs-96-302.htm</A>

Cheers,

Phil Jackson
------------------------------------------------------