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    Home/Original/inverse
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    Inverse View

    It is not the case that The urn model of genetic drift has limited explanatory power because it lacks an analogue for reproduction.

    ?Set your confidence on the premises below to see your aggregate.

    Reasons For

    1 perspective
    Reason for
    ?
    • 1.Balls in the urn model do not produce offspring.
      ?

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    • 2.Biological populations reproduce, and offspring number can vary, which affects allele frequency change.
      ?

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    Reasons Against

    2 perspectives
    Reason against 1 of 2
    ?
    • 1.Mechanistic explanation requires that models preserve causally relevant process structure, not merely input-output statistics (Machamer, Darden, Craver 2000).
      ?

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    • 2.Variance in offspring number (Vw) is a distinct causal contributor to allele frequency change, irreducible to sampling from a fixed population.
      ?

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    • 3.An urn model that omits reproductive variance cannot represent the causal mechanism generating drift, only a statistical surrogate of its outcome.
      ?

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    Reason against 2 of 2
    ?
    • 1.Effective population size (Ne) compensates mathematically for missing reproductive structure, but compensation masks rather than explains the underlying causal factors.
      ?

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    • 2.Philosophers of biology like Matthen and Ariew argue that drift explanations must cite population-level causal processes, not merely probabilistic redescriptions.
      ?

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    • 3.A model that requires external correction factors to approximate biological reality has explanatory gaps where those corrections do causal work the model cannot.
      ?

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