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    J.J. Gibson's ecological optics demonstrates that relatio... — Carmelics
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    Challenges→Perceptual appearances must be entirely mental and internal, rather than relational

    J.J. Gibson's ecological optics demonstrates that relational properties like 'subtended visual angle' are genuinely present in the optic array and causally structure perception.

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    1 reason for
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    Reasons For

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    Reason for
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    • 1.Subtended visual angle is mathematically determinate and observer-independent, existing objectively in light structure before perception occurs.
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    • 2.Animals with different visual systems detect identical relational properties, suggesting these properties are genuinely in the optic array, not constructed.
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    • 3.Direct perception of affordances requires information that is relational (size relative to agent), making relational properties causally necessary for ecological behavior.
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    Reasons Against

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    Reason against
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    • 1.Subtended angle is mind-dependent: it only exists relative to a perceiver's position, making it a relational construct, not an intrinsic feature of light.
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    • 2.The optic array is a mathematical abstraction; physical light carries energy/wavelength, not geometrical relations that 'structure' anything causally.
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    • 3.Neural processing demonstrably transforms optical information non-linearly, suggesting perception depends on internal mechanisms, not direct optic array structure.
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    Related

    Animals with different visual systems detect identical relational properties, su...Direct perception of affordances requires information that is relational (size r...Neural processing demonstrably transforms optical information non-linearly, sugg...Perceptual appearances must be entirely mental and internal, rather than relatio...
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    Subtended angle is mind-dependent: it only exists relative to a perceiver's posi...Subtended visual angle is mathematically determinate and observer-independent, e...The optic array is a mathematical abstraction; physical light carries energy/wav...

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