But probability says that if business records are 80% reliable, and present sense impressions are 70% reliable, a business record that is based on a present sense impression is 56% reliable (if I did the math right).
Well, .7*.8=.56, certainly, but personally I would not be so casual about assuming that the two failure rates are independent.
Well, .7*.8=.56, certainly, but personally I would not be so casual about assuming that the two failure rates are independent.