  This paper considers KLM-style preferential non-monotonic reasoning in the
setting of propositional team semantics. We show that team-based propositional
logics naturally give rise to cumulative non-monotonic entailment relations.
Motivated by the non-classical interpretation of disjunction in team semantics,
we give a precise characterization for preferential models for propositional
dependence logic satisfying all of System P postulates. Furthermore, we show
how classical entailment and dependence logic entailment can be expressed in
terms of non-trivial preferential models.
