 Importantly, the so-called Ramsey Test (adding the antecedent hypothetically to one’s beliefs) has inspired a number of approaches that stand as some of the cornerstones of conditional logics. This includes Stalnaker’s modal logic of conditionals based on the idea that the antecedent of a conditional selects a hypothetical possible world (Stalnaker 1968). It also includes Adams’s approach based on studying formally the idea that the probability of (non-nested) conditionals is given by the corresponding conditional probability (Adams 1965, 1975), as well as more qualitative theories of the acceptability of conditionals in terms of (non-probabilistic) belief revision policies (Gärdenfors 1986). Finally, Ramsey’s idea that conditionals with a false antecedent are void underlies the main motivation behind three-valued accounts of conditionals, developed independently by various authors (in particular by de Finetti 1936).