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    LoyalLoyalJusticeJustice
    Made withinDC&Austin
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    321,452
    Perspectives
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    42
    Home/Original/inverse
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    Inverse View

    It is not the case that Indiscriminate and discriminate sampling processes can occur simultaneously in the same population with respect to the same trait

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

    Reasons For

    2 perspectives
    Reason for 1 of 2
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    • 1.A process is discriminate or indiscriminate relative to a description of the mechanism, not relative to the trait affected.
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    • 2.If colonization founding events causally track shell color frequencies (however imperfectly), the process is discriminate, not simultaneously both.
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    • 3.Lamotte's claim conflates two temporally sequential processes acting on the same trait with two simultaneous causal processes, which is a category error.
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    Reason for 2 of 2
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    • 1.Matthen and Ariew argue that drift and selection are not distinct population-level causes but are statistical abstractions over individual causal histories.
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    • 2.If drift and selection are not ontologically distinct causal processes, the claim that they 'simultaneously occur' misrepresents a single causal process under two mathematical descriptions.
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    • 3.The Cepaea case therefore shows one causal process—differential survival by color—being decomposed statistically, not two processes genuinely co-occurring.
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    Reasons Against

    1 perspective
    Reason against
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    • 1.In a study of over 900 populations, camouflage gave appropriately colored Cepaea nemoralis land snails a selective advantage (discriminate sampling)
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    • 2.Lamotte simultaneously maintained that foundings of new populations are of considerable importance because of chance variations in the composition of the first colonizers (indiscriminate sampling)
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    • 3.Both processes were observed operating on the same trait — shell color — in the same populations
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