  Causality is typically treated an all-or-nothing concept; either A is a cause
of B or it is not. We extend the definition of causality introduced by Halpern
and Pearl [2001] to take into account the degree of responsibility of A for B.
For example, if someone wins an election 11--0, then each person who votes for
him is less responsible for the victory than if he had won 6--5. We then define
a notion of degree of blame, which takes into account an agent's epistemic
state. Roughly speaking, the degree of blame of A for B is the expected degree
of responsibility of A for B, taken over the epistemic state of an agent.
