Re: Top level ontology

John McCarthy (jmc@Steam.Stanford.EDU)
Sun, 30 Nov 1997 10:10:06 -0800 (PST)

I am concerned about the excessive emphasis on hierarchy, i.e. the
relations among unary predicates, in discussions of ontology. I think
the lack of mastery of non-unary predicates is more of an obstacle to
use of the ontologies.

For example, what about "x is between y and z" in its various