Bayes’ Rule
• Bayes’ Rule underlies all modern AI
systems for probabilistic inference
• two forms of product rule:
P(AÙB) = P(A|B) P(B)
P(AÙB) = P(B|A) P(A)
• Now use these two to form an equation for:
P(B|A) = P(A|B) P(B) / P(A)