 Apparently, much as no propositional connective \(\rightarrow\) can obey Stalnaker’s Hypothesis in probability theory, none can obey The Ramsey Test in belief revision theory either. Whether we approach epistemology using probabilities or flat-out beliefs, the same problem arises. Should we conclude that conditionals have no factual content? It’s a hotly contested question, on which  the entry on conditionals  has more.