Approximating Newtonian behavior within each branch presupposes the very individuation of branches that decoherence alone, without additional interpretive commitments, cannot provide.

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Reasons For

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Reason for

1.Decoherence is a dynamical process describing loss of coherence; it doesn't inherently define what constitutes a 'branch' or 'system boundary.'
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2.Classical mechanics requires determinate particle trajectories; branching alone permits multiple incompatible trajectories without additional interpretation.
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3.Objective physical individuation needs criteria independent of observer choice; decoherence depends on selecting subsystem/environment partitions.
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Reasons Against

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Reason against

1.Decoherence sufficiently suppresses interference between branches, making classical dynamics empirically adequate without metaphysical individuation.
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2.The 'additional commitments' required are merely practical framings, not deep metaphysical necessities—similar to choosing coordinate systems in relativity.
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3.Newtonian approximation succeeds when decoherence timescales are short relative to measurement timescales, regardless of philosophical branch ontology.
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Key Terms

Branch(as used in quantum mechanics and many-worlds interpretation): One possible outcome or version of reality in a scenario where multiple things could happen simultaneously.
Interpretive commitments(as used in philosophy of science): The underlying assumptions and beliefs you bring to how you understand something—like deciding whether a blurry photo shows a ghost or just a smudge based on what you already believe about ghosts.
Newtonian behavior(as used in quantum mechanics): The way objects move and interact according to Isaac Newton's laws of physics—the common-sense physics we observe in everyday life, where things fall down, objects in motion stay in motion, and forces cause predictable changes.
Presupposes(as describing what Plantinga's argument takes for granted): Assumes something to be true without proving it—like how an argument might presuppose that logic works, without first arguing that logic is valid.
decoherence(Used to describe why macroscopic superpositions are not directly observed, and assessed here for whether it resolves the measurement problem.): A quantum mechanical process in which differently localised states of a measuring apparatus couple to different states of the surrounding environment, entangling the composite system and suppressing interference between branches.
individuation(Scholastic debate over the principle of individuation): The metaphysical explanation of what makes a particular thing a distinct individual rather than a universal or shared nature

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Causation1 linked Consciousness & Mind1 linked

Classical mechanics requires determinate particle trajectories; branching alone ...Decoherence is a dynamical process describing loss of coherence; it doesn't inhe...

Details

Type: claim
Perspectives: 2 (1 for, 1 against)
Edits: 1 edit