Simply put, Ducasse defined some particular event c as the cause of some effect e if and only if c was the only change occurring in the immediate environment of e just prior to e. The striking of the match is the cause of the flaming match just insofar as the striking is the only change occurring in the immediate vicinity of the flaming match just prior to the flaming of the match. Ducasse intended this definition to rebut Hume’s claim that singular causal relations between particular events mus