 RNB allows the skeptic to accept doctrines on rational grounds, by distinguishing beliefs from other attitudes that can take the place of beliefs in chains of inference: in particular, belief-like suppositions that function as hypotheses (see Striker 1980, Bett 1990, and Reinhardt 2018). On the RNB view Arcesilaus accepted [i]–[iii] hypothetically (see Schofield 1999, Perin 2010, and Thorsrud 2018).