  The primary theme of this investigation is a decision theoretic account of
conditional ought statements (e.g., "You ought to do A, if C") that rectifies
glaring deficiencies in classical deontic logic. The resulting account forms a
sound basis for qualitative decision theory, thus providing a framework for
qualitative planning under uncertainty. In particular, we show that adding
causal relationships (in the form of a single graph) as part of an epistemic
state is sufficient to facilitate the analysis of action sequences, their
consequences, their interaction with observations, their expected utilities
and, hence, the synthesis of plans and strategies under uncertainty.
