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    Aquinas holds that predicates apply to a species in virtu... — Carmelics
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    Challenges→Accidental forms inhering in individual substances can be predicated of the universal substantial form those individuals instantiate only indirectly (essentialiter), through and in virtue of those individuals

    Aquinas holds that predicates apply to a species in virtue of what belongs to the species as such, making accidental properties of individuals categorically distinct from species-level predication.

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    Reasons For

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    Reason for
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    • 1.Species have essential natures that persist across individuals; predicates about species refer to these essences, not accidents.
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    • 2.Accidental properties vary between individuals of the same species; essential predicates must exclude such variation to be meaningful.
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    • 3.Aquinas's metaphysics requires a principled distinction between what defines a kind and what merely happens to belong to instances.
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    Reasons Against

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    Reason against
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    • 1.Modern biology shows species lack sharp essential boundaries; predicates apply through statistical patterns, not categorical essences.
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    • 2.Individual accidents causally constitute species-level properties; we cannot cleanly separate them into distinct categorical levels.
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    • 3.The distinction assumes we can identify species essences a priori, but observation suggests essences are theory-laden constructs.
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    Key Terms

    Aquinas
    Thomas Aquinas was a medieval Italian priest and philosopher (1225-1274) who became one of the most influential thinkers in Western history. He attempted to show that Christian faith and human reason are compatible, arguing that we can use logic and observation to understand God and the natural world. His ideas deeply shaped Catholic theology and continue to influence how religious and secular institutions think about ethics, knowledge, and the relationship between science and belief.
    Predicates(in logic and philosophy of language)
    Words or phrases that describe properties or characteristics of something—like 'is red' or 'is tall' in the sentence 'The ball is red.'
    accidental properties(Aristotelian substance theory)
    Properties of an object that can be gained and lost over time and which the object might never have possessed at all
    species(Bacon's multiplicatio specierum theory adapted to epistemology by Crathorn)
    A representative likeness of an external thing, transmitted causally through a medium; in Crathorn's usage, a material mental quality in the mind that has the same nature as the external thing it represents.
    species-level predication(in logic and classification)
    Describing what is true about an entire category or type of thing, rather than about individual members of that category.

    Connections

    2 topics

    Modality & Possibility1 linkedPhilosophy of Language1 linked

    Related

    Accidental forms inhering in individual substances can be predicated of the univ...Accidental properties vary between individuals of the same species; essential pr...

    Details

    Type
    claim
    Perspectives
    2 (1 for, 1 against)
    Edits
    1 edit
    Aquinas's metaphysics requires a principled distinction between what defines a k...
    Individual accidents causally constitute species-level properties; we cannot cle...
    +3 moreShow less
    Modern biology shows species lack sharp essential boundaries; predicates apply t...Species have essential natures that persist across individuals; predicates about...The distinction assumes we can identify species essences a priori, but observati...