how you can talk about probabilities without talking about several possible worlds
But if probability is in the mind, and the mind in question is in this world, why are other worlds needed? Moreover (from wikipedia):
In Bayesian theory, the assessment of probability can be approached in several ways. One is based on betting: the degree of belief in a proposition is reflected in the odds that the assessor is willing to bet on the success of a trial of its truth.
Disposition to bet surely does not require a commitment to possible worlds.
how you can talk about probabilities without talking about several possible worlds
But if probability is in the mind, and the mind in question is in this world, why are other worlds needed? Moreover (from wikipedia):
Disposition to bet surely does not require a commitment to possible worlds.