Discussion
What does each node of a Bayesian network carry?
Answer: A
The conditional probability table gives one distribution for every combination of the parents' values, and the product of all such tables is the joint. A node with no parents carries its marginal. Correlations and causal strengths are different quantities. That the local tables multiply to give the global distribution is the whole content of the factorisation, and it is what makes local elicitation sufficient.
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