Editorial Board
Introduction to the special volume on knowledge representation
Nonmonotonic reasoning in the framework of situation calculus
The computational complexity of abduction
Temporal constraint networks
Impediments to universal preference-based default theories
Embedding decision-analytic control in a learning architecture
The substitutional framework for sorted deduction: Fundamental results on hybrid reasoning
Existence assumptions in knowledge representation
Hard problems for simple default logics
The effect of knowledge on belief: Conditioning, specificity and the lottery paradox in default reasoning
Three-valued nonmonotonic formalisms and semantics of logic programs
On the applicability of nonmonotonic logic to formal reasoning in continuous time
Principles of metareasoning
Author index—Volume 49 (1991)