Summary

Response to Sara Imari Walker’s claim that probabilistic causation is incoherent. Defends counterfactual probability assignment via Many-Worlds quantum mechanics.

Key Concepts:

  • Walker’s claim: “If causation is predicated on counterfactuals, then it cannot be probabilistic: we cannot assign probabilities to things that don’t happen”
  • Quantum Branching Universe (QBU) framework: Counterfactuals aren’t hypothetical—they’re actualized branches with measurable weight (Measure)
  • Ontological grounding: What “doesn’t happen” from our perspective does happen in other branches, making counterfactuals real
  • Causation as inter-branch relation: Causation relates actual and counterfactual branches; probability is objective measure across multiverse
  • Metaphysical dependency: Coherent probabilistic causation requires accepting multiverse realism

Central Insight: Probabilities can meaningfully apply to counterfactuals if one accepts richer metaphysical tapestry where counterfactuals genuinely exist.

Tags

Cross-References

  • Related: Many-Worlds interpretation of quantum mechanics [external]
  • Related: Measure theory in quantum mechanics [external]
  • Related: The Quantum Sequence

Notes

  • Engages with contemporary Assembly Theory debates
  • Demonstrates axionic commitment to Many-Worlds as foundational metaphysics
  • “QBU framework” terminology suggests this is established conceptual apparatus
  • Illustrates how metaphysical commitments (multiverse realism) enable specific philosophical positions
  • Published early June 2025—part of sustained output period