%A Mujdat Pakkan %A Varol Akman %J Artificial Intelligence Review %T Issues in Commonsense Set Theory %X The success of set theory as a foundation for mathematics inspires its use in artificial intelligence, particularly in commonsense reasoning. In this survey, we briefly review classical set theory from an AI perspective, and then consider alternative set theories. Desirable properties of a possible commonsense set theory are investigated, treating different aspects like cumulative hierarchy, self-reference, cardinality, etc. Assorted examples from the ground-breaking research on the subject are also given. %K ZF (Zermelo-Fraenkel) set theory, commonsense reasoning, knowledge representation, cumulative hierarchy, self-reference, nonwellfounded sets (hypersets), AFA (anti-foundation axiom), paradoxes, common knowledge. %P 279-308 %V 8 %D 1995 %L cogprints468