Consider the Bayesian network in
Figure burglary-figure.
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If no evidence is observed, are
${Burglary}$ and${Earthquake}$ independent? Prove this from the numerical semantics and from the topological semantics. -
If we observe
${Alarm}{{,=,}}{true}$ , are${Burglary}$ and${Earthquake}$ independent? Justify your answer by calculating whether the probabilities involved satisfy the definition of conditional independence.