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Philosophical conjectures and their refutation.

A G Kluge1

  • 1Museum of Zoology, University of Michigan, Ann Arbor, Michigan 48109-1079, USA. akluge@umich.edu

Systematic Biology
|July 16, 2002
PubMed
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Karl Popper's corroboration formalism is not a conditional probability. Falsificationism, not verificationism, accurately describes phylogenetic inference methods, refuting claims that statistical probability justifies them.

Area of Science:

  • Philosophy of Science
  • Phylogenetic Systematics

Background:

  • Sir Karl Popper's corroboration formalism, C(h,e,b), is often misunderstood.
  • Recent arguments suggest C(h,e,b) reduces to conditional probability, misinterpreting Popper as a verificationist.

Purpose of the Study:

  • To refute the claim that Popper's corroboration formalism is equivalent to conditional probability.
  • To clarify the role of falsificationism in phylogenetic inference.
  • To address the explanatory power of maximum likelihood in phylogenetic systematics.

Main Methods:

  • Analysis of Karl Popper's derivation of C(h,e,b) from absolute probability and severity of test.
  • Critique of the reduction of Popper's formalism to conditional probability p(e,hb).
  • Examination of the application of falsificationism versus verificationism in phylogenetic systematics.

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Main Results:

  • Popper's C(h,e,b) is derived from absolute probability and severity of test, not solely conditional probability.
  • The conjecture p(e,hb) = C(h,e,b) is refuted.
  • Falsificationism, not verificationism, correctly characterizes the parsimony method in phylogenetic systematics.

Conclusions:

  • De Queiroz and Poe's interpretation of Popper's corroboration is incorrect.
  • Statistical probability does not justify the parsimony method in phylogenetics.
  • Maximum likelihood models do not achieve causal explanation in the context of character evolution.