Bayesian updating according to new information is given by equation 3

P rob(X|S) = p p + (1 )(1 p) (2)

a) Emres prior belief in the probabibility that the laptop is suitable is 50%. He then reads a review online stating that the laptop is indeed suitable. If he thinks there is a 60% probability that the reviewer is telling the truth, what will be his posterior belief about the probability that the laptop is suitable?

b) Why is the trust in the reviewer related to the likelihood of reading more reviews? What would happen if Emre had complete trust in a review?