The addition of a bit of luck to the unsuccessful assassin's story cannot ground a deep contrast between the two agents in terms of their moral responsibility.

On the other hand, one might think that if the two assassins just mentioned are identical in terms of their values, goals, intentions, and motivations, then the addition of a bit of luck to the unsuccessful assassin’s story cannot ground a deep contrast between these two agents in terms of their moral responsibility. One way to sustain this position is to argue that moral responsibility is a function solely of internal features of agents, such as their motives and intentions (Khoury 2018; also see Enoch & Marmor 2007 for some of the main arguments against moral luck). Of course, the succes...