“Although Ramsey's and de Finetti's accounts endowed an agent's probabilities with a purely subjective status they knew that, for from rendering those quantities scientifically valueless, the condition of consistency combined with the rule of conditionalization supports a powerful new epistemology called Bayesian epistemology. Its scientific appeal lies principally in two features: (i) so-called Bayesian networks are not only extremely powerful diagnostic tools but also provide the formal basis of some of the most revolutionary developments in AI; (ii) in fairly general circumstances agents with different initial, or prior, probability functions will, with enough new information, find their updated probabilities converging; in this way, it is claimed, objectivity is realized as an emergent property of consistent subjective assignments.”