For one of these problems, they are trying to choose between actions A and B; for the other, unrelated problem, they need to choose between actions Y and Z. Now suppose that for each problem, when deciding whom to trust, they consider their beliefs about both problems. The basic dynamics of the model are the same as before: each scientist uses Jeffrey’s rule, which, remember, specifies how to update beliefs when you are not certain about evidence, but now the uncertainty they assign to a person’s evidence depends on the distance between their beliefs on both topics.
