In simple use of Bayes' theorem , we studies probabilities of the relationship between two phenomena.
If there are more than three phenomena, the method is callde "Bayesian network" (BN).
In the field of Artificial Intelligence , Deep Learning is famous in these days. Deep Learning is good at to deal with complicated situation on the surface. BN could be called as a good method to deal with the complicated situation in the background of the surface.
There are three use of BN. Those are Calculation of Probability , Structure Analysis and Pattern Recognition
Calculation of Probability is complicated use of Bayes' theorem . Other uses are the similar way of Multi-Variable Analysis and Data Mining .