Many philosophers accept an ‘Authority Thesis’ according to which self-ascriptions of one’s current mental states ordinarily are or ought to be met with a distinctive presumptive of truth. Recently, however, Wolfgang Barz (2018) has argued that there is no adequately specified Authority Thesis. This, he argues, is because available specifications are either (1) philosophically puzzling but implausible, or (2) plausible but philosophically unpuzzling. I argue that there are several plausible and philosophically puzzling specifications of the Authority Thesis.