“…Mackie (1977),Garner (1990),Joyce (2001),Streumer (2013a), and Olson (2014).2Olson (2014: 152-155) tries to reduce hypothetical reasons to the (empirically kosher) relation between desires and the means to their realisation.3 The hypothetical/categorical distinction comes from Kant, whoKorsgaard (2009) and others interpret as a constructivist. Note that moral error theorists see moral discourse as involving a metaphysically 'robust' categoricity, not something constructed from agency.4 For more on how might understand commitment, seeKalf (2013).…”