where the most likely tree, given a particular model of evolution, is selected, and branch lengths are inferred.

According to the cladistic interpretation, homoplasy is invoked when the distribution of a character state cannot be explained parsimoniously (without extra inferred character state transformations between the terminals and their ancestral node) on a preferred phylogenetic hypothesis - that is, the feature in question arises (or disappears) at more than one point on the tree.

In the

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