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Go up to 1 Qualitative Effect of Observations in Belief Networks
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Solution to part (a)

Suppose you had observed a value for variable G. What other variables could have their belief changed as a result of this observation?

Answer: F, H, and I. As G has no ancestors, only those variables that are descendants of G can be affected by observing G.

Computational Intelligence online material, ©David Poole, Alan Mackworth and Randy Goebel, 1999

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