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Parsimony with and without Scientific Justification.

Arnold G Kluge1

  • 1Museum of Zoology, University of Michigan, Ann Arbor, Michigan, 48109.

Cladistics : the International Journal of the Willi Hennig Society
|December 16, 2021
PubMed
Summary

Non-evolutionary cladistics lacks scientific justification. Phylogenetic parsimony, grounded in descent with modification, provides a more robust framework for hypothesis testing in evolutionary biology.

Area of Science:

  • Systematic Biology
  • Evolutionary Biology
  • Phylogenetics

Background:

  • The pursuit of a non-evolutionary cladistics, as proposed by Brower and others, faces challenges in scientific justification.
  • Existing frameworks lack compelling reasons for prioritizing specific hierarchical branching patterns without an evolutionary context.

Purpose of the Study:

  • To critically evaluate the scientific basis of non-evolutionary cladistics.
  • To highlight the limitations of operational parsimony in the absence of evolutionary theory.
  • To advocate for phylogenetic parsimony as a superior approach.

Main Methods:

  • Analysis of the theoretical underpinnings of non-evolutionary cladistics.
  • Comparison of operational parsimony with phylogenetic parsimony.

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  • Examination of the role of evolutionary theory in justifying cladistic methods.

    • Main Results:

    • Non-evolutionary cladistics lacks sufficient scientific justification.
    • Operational parsimony does not adequately replace phylogenetic parsimony.
    • Absence of evolutionary theory (descent with modification) undermines the rationale for seeking congruence among character hierarchies.

    Conclusions:

    • Phylogenetic parsimony, which assumes descent with modification, offers a more scientifically sound approach.
    • The most parsimonious cladogram, under phylogenetic principles, represents the least disconfirmed and most corroborated hypothesis.
    • Evolutionary theory is essential for a robust scientific foundation in cladistics.