Bayes’ theorem is a term that some of you might have come across in recent times. While it is not a new concept by any means, the interest in Bayesian process has increased considerably in therecent past. Experts believe that Bayesian ideas could be applied in a variety of different fields – from physics to cancer research, psychology, artificial intelligence, and even national security.  What is this supposedly all-encompassing theory and why is it so popular? Let us take a look. What is Bayesian Thinking? Bayes’ theorem deals with conditional probability. It describes the probability of an event taking place, based on the information or knowledge related