Markov Blanket
• Suppose we want to know the probability of each
variable's values given all other variable values.
• Recall P(x1, …, xn)  =
     P(x1|ParentValues(x1)) * … *
     P(xn|ParentValues(xn))
• In computing P(x1, …, xi, …, xn), which of the terms in
the above product involve xi?
• How would you describe the variables which appear in
those terms? (see example)
• These neighboring variables are called Xi's Markov
blanket.