An ineffectual link is one in which the CPT table of its child node contain the same probabilities independent of the state of that link's parent node.  In other words, the table contains replicated chunks, with an identical chunk for each state of the parent node.

Ineffectual links may be removed without effecting inference results at all.  When a link is first added, it is added as an ineffectual link, and remains that way until the CPT tables of its child node are modified.

Netica can find and display all the ineffectual links in a net.

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