The Prevalence and Impact of Model Violations in Phylogenetic Analysis.

Thus, although the number of substitutions in a partition is a highly significant ( P < 2e-16) predictor of passing or failing any of the tests, that it explains only about a quarter of the variation suggests that other factors, such as underlying differences in the extent to which partitions violate the SRH assumptions, are driving the remaining ∼75% of the variation.

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