 Shareability is the strongest of the three requirements. It combines shared evaluative standards with the shared reasons requirement (Bowman and Richardson 2009; Hartley and Watson 2009; Watson and Hartley 2018). Public reason liberals often argue that justifying reasons are necessarily shared. But they say little about what it means to share reasons. Public reason liberals presumably hold that reasons must be shareable, in that citizens have the reasons at the right level of idealization.