 Now, if the sufficiency principle is correct, then the same set of causal conditions that gives rise to an accidentally true awareness-episode couldn’t possibly give rise to a false awareness-episode. Otherwise, we would be committed to something absurd, namely that even false awareness-episodes are true. The only other option is to grant that the set of causal conditions that gives rise to a true awareness-episode can only give rise to true awareness-episodes. In that case, the proposed definition of knowledge would be incapable of ruling out instances of accidentally true awareness.