From onions to broccoli: generalizing Lewis' counterfactual logic
Patrick Girard · Journal of Applied Non-Classical Logics · 2007
We present a generalization of Segerberg's onion semantics for belief revision, in which the linearity of the spheres need not occur. The resulting logic is called broccoli logic. We provide a minimal relational logic, with a bi-modal neighborhood semantics. We then show that broccoli logic is a well-known conditional logic, the Burgess-Veltman minimal conditional logic.