The historical trajectory traced in this series has led to a precise conclusion:
Once that conflation is exposed, realism is no longer bound to intrinsic properties, observer-independent attributes, or context-free definiteness.
The task now is not to abandon realism — but to rewrite it.
1. The Collapse of the Independence Requirement
But quantum theory demonstrates that:
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Not all physical properties can be assigned simultaneously.
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Measurement outcomes depend on experimental context.
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Non-contextual intrinsic value assignments are structurally impossible (as formalised in the Kochen–Specker theorem).
If intrinsic, context-independent properties are not supported by our best physical theory, then realism cannot require them.
Thus realism must be decoupled from independence ontology.
2. What Realism Can Mean Without Independence
If realism is not defined by intrinsic properties, what remains?
Three commitments are sufficient:
(a) Constraint
(b) Stability of Structure
(c) Explanatory Depth
Theoretical frameworks capture real structural relations that account for observable phenomena.
None of these require intrinsic, context-free properties.
They require structure.
3. Structural Realism as the Rewritten Position
One promising reconstruction is structural realism.
In its contemporary articulation, especially associated with John Worrall, structural realism holds that what science successfully captures is not the intrinsic nature of objects, but the structural relations preserved across theory change.
Realism becomes commitment to structure rather than to independently existing property-bearers.
This move already loosens the grip of independence ontology.
But we can go further.
4. From Structure to Relational Ontology
Quantum theory does not merely suggest structural relations.
It suggests that properties themselves are contextually constituted within measurement frameworks.
Rather than objects possessing intrinsic attributes, we encounter:
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systems defined through relational configurations,
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observables meaningful only within experimental contexts,
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outcomes emerging from structured interactions.
This aligns naturally with a relational ontology in which:
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entities are not isolated substrates,
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but nodes within structured networks of relations.
Realism, then, becomes commitment to the reality of structured relations that constrain and organise phenomena.
Not to intrinsic independence.
5. Realism Reframed
We can now state the revised doctrine:
Scientific realism is the claim that scientific theories track real structural constraints of the world, not that the world consists of intrinsically self-contained objects with context-independent properties.
This formulation preserves everything realism originally aimed to secure:
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objectivity
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explanatory power
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predictive success
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resistance to arbitrary relativism
But it removes the unnecessary metaphysical baggage of independence ontology.
6. Why This Is Stronger, Not Weaker
Independence realism faces tension with quantum theory.
Structural realism aligns with it.
Rather than forcing physics to fit a classical metaphysics, structural realism reads metaphysics from the structure of the best available theory.
This is not anti-realism.
It is realism disciplined by scientific structure.
7. The End of the Misidentification
The historical arc now closes.
We have seen how:
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Early modern philosophy introduced a sharp subject–object divide.
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Newtonian physics reinforced the image of intrinsic properties.
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Scientific realism inherited independence as a background assumption.
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Quantum theory undermined intrinsic, non-contextual definiteness.
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The equation of realism with independence was exposed as a historical conflation.
Realism does not require independence.
Realism requires structure.
8. After Independence
Once independence is no longer the defining criterion of realism, several possibilities open:
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Contextual objectivity
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Relational ontologies
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Structural accounts of physical law
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Theory-mediated realism
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Non-intrinsic accounts of physical properties
These are not departures from realism.
They are its maturation.
9. Closing the Series
The journey began with the question:
Does empirical success require ontological independence?
The answer is now clear:
No.
Empirical success requires structural alignment between theory and world — not intrinsic property realism.
The metaphysical assumption that realism must mean independence has been dismantled.
Realism survives — but transformed.
And with that transformation, philosophy of science moves beyond the early modern inheritance and into a framework compatible with the deepest insights of contemporary physics.
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