Diagnostic test for certain disease has 95% sensitivity (a positive test given the person has the disease) and 95% specificity (a negative test given the person does not have the disease). Only [%] of the population has the disease in question. Given the diagnostic test reports that a person chosen at random from the population tests positive, what is the probability that the person does, in fact, have the disease? Are you surprised by the size of the answer? Do you consider this diagnostic test reliable?