modal structuralism

Compiled with AI assistance and selectively reviewed. Please consult the cited passages; the books remain the authoritative source. About this companion

Editorial synthesis · provisional

Definition

Modal structuralism is the view, presented through Steven French, that physical possibility has an objective structure articulated by laws, symmetries and constraints. In the book’s transactional discussion, these structures shape which exchanges can occur before one outcome actualizes. Possibility is therefore neither an unstructured collection of imagined alternatives nor merely missing knowledge about already fixed individual objects.

Explanation

The transactional passage uses French’s modal structure to describe a field in which available exchanges are already law-shaped. Energy, momentum and other constraints delimit admissible candidates before one transaction completes. The structural claim explains the organization of alternatives; it does not itself calculate which particular candidate becomes actual.

Later ontic structural realism gives relations and modal structure priority over self-standing individual objects. That affinity should preserve French’s attribution and the difference between the philosophical position and Kastner’s physical interpretation. Ladyman’s structuralist quantum discussion does not require adopting collapse, so structural realism is not simply another name for RTI.

The author broadens possibility beyond Kastner’s strictly prepared or emitted quantum states. The later taxonomy explicitly distinguishes law-permitted possibilities from that restricted physical sense. Modal structure must consequently be specified by its domain rather than used to erase the books’ different meanings of possible or to identify every conceivability with physical reality.

Scope and attribution

Preserve French’s attribution and domain-specific modal senses.

RB1 — The Real Book, Volume I: The Possible Is Real

French’s law- and symmetry-shaped modal structure informs the transactional exposition and structural realism.

Occurrence locators: 54, 122, 131.

Background used in the editorial explanation

Named theories and mechanisms are distinguished from neighboring background, homonyms and the author’s own synthesis. Reproduced AI passages retain their separate voice.