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Stability, sensitivity, science and heurism.

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Cladistics : the International Journal of the Willi Hennig Society
|December 11, 2021
PubMed
Summary

Weighted-classes sensitivity analysis (WCSA) is critiqued for its lack of scientific rigor and heuristic value. This phylogenetic method fails to provide objective knowledge claims and is not the strictest test for hypotheses.

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Area of Science:

  • Phylogenetics
  • Systematic Biology
  • Computational Biology

Background:

  • Examines justifications for weighted-classes sensitivity analysis (WCSA).
  • Critiques claims that WCSA represents the strictest phylogenetic hypothesis test.
  • Analyzes the arbitrary classification of phylogenetic methods by Giribet (2003a).

Discussion:

  • Refutes the notion of 'nodal stability' or 'nodal support' as arbitrary and obscuring method relationships.
  • Argues that statistical or taxonomic stability is not a primary goal in phylogenetic science.
  • Highlights the impossibility of trial repetition in ideographic sciences like phylogenetics.

Key Insights:

  • Schulmeister's (2003) 'robust-choice' defense of WCSA fails to establish non-arbitrary parameter bounds.
  • The interpretation of WCSA as simultaneously verificationist and falsificationist is logically inconsistent.
  • WCSA is deemed neither scientific nor heuristic, thus not advancing objective knowledge.

Outlook:

  • Re-evaluating sensitivity analysis methods in phylogenetics is crucial.
  • Developing scientifically sound and heuristic approaches is necessary for objective knowledge claims.
  • Future research should focus on methods that genuinely contribute to phylogenetic advancement.