On Prudent Bravery and Other Abstractions
Melvin Fitting · 1999
ions Melvin Fitting [email protected] Dept. Mathematics and Computer Science Lehman College (CUNY), Bronx, NY 10468 Depts. Computer Science, Philosophy, Mathematics Graduate Center (CUNY), 33 West 42nd Street, NYC, NY 10036 # October 13, 1994 Abstract A special class of partial stable models, the intrinsic ones, is singled out for consideration, and attention is drawn to the largest one, which we designate as the prudently brave one. It is the largest partial stable model that is compatible with every partial stable model. As such, it is an object of natural interest. Its existence follows from general properties of monotonic functions, so it is a robust notion. The proofs given concerning intrinsic stable models are not new, but they appeared earlier in quite di#erent contexts. What we do, essentially, is call the attention of the logic programming and non-monotonic reasoning community to them. We further show the entire development fits into the bilattice ...