
The most general change for the fifth edition was the extension of the material related to the
 stochastic approaches to AI. To accomplish we added a completely new 
Chapter 5 that introduces the stochastic methodology. 
From the basic 
foundations of set theory and counting we develop the notions of 
probabilities, random variables, and independence. We present and nse 
Bayes' theorem first with one symptom and one disease and then in its 
full general form. 
We
 examine the hypotheses that underlie the use of Bayes and then present 
the argmax and naive Bayes approaches. We present examples of stochastic
 reasoning, including several from work in the analysis of language 
phenomena. We also introduce the idea of conditional independence that 
leads to our presentation of Bayesian belief networks (BBNs) and 
d-separation in Chapter 9.
 

 
 
 
 
 
 
