 One reason to doubt this, however, is that whereas some theories hold that whether an agent ought to perform an act just depends on whether its outcome outranks every available alternative, other theories hold that it depends instead on whether the outcome of the best option in which the agent performs it outranks every available alternative. Thus, an act whose outcome outranks every available alternative needn’t be one that ought to be performed, contrary to Dreier’s assertions. To illustrate, consider the following example from Frank Jackson: