The strong emergence of molecular structure

Area of Science:

• Philosophy of Science
• Quantum Chemistry
• Metaphysics

Background:

• Molecular structure is a key example of strong emergence.
• Robin Hendry's influential account uses downward causation.
• This paper critically analyzes Hendry's theory.

Purpose of the Study:

• To explain Hendry's account of strong emergence in molecular structure.
• To argue for the necessity of a diachronic reflexive notion of downward causation for coherence.
• To identify and analyze three previously unnoticed challenges to this account.

Main Methods:

• Conceptual analysis of Robin Hendry's theory.
• Examination of the role of downward causation in explaining molecular structure.
• Critique of empirical evidence and assumptions within Hendry's framework.

Main Results:

• Hendry's account requires a specific, diachronic reflexive notion of downward causation to be coherent.
• The empirical evidence for strong emergence of molecular structure also challenges supervenience.
• Ambiguity exists in invoking determinate nuclear positions to support strong emergence.
• Certain causal theories make downward causation between molecular structure and quantum entities untenable.

Conclusions:

• Hendry's influential account of strong emergence in molecular structure faces significant, unaddressed challenges.
• The theory's coherence is threatened by issues related to empirical evidence, assumptions about nuclear positions, and the nature of causation.
• Further refinement or alternative explanations are needed to establish the strong emergence of molecular structure.