Sorry, I should have provided a more complete quote: > If you get tested again, you can reduce your uncertainty enormously, because your probability of having

Sorry, I should have provided a more complete quote: > If you get tested again, you can reduce your uncertainty enormously, because your probability of having cancer, P(B), is now 50 percent rather than one percent. If your second test also comes up positive, Bayes’ theorem tells you that your probability of having cancer is now 99 percent, or .99. This statement is incorrect if the results are correlated at all.