Physics textbooks tell us that a reference frame is a coordinate system — a neutral backdrop against which motion, position, and time can be measured. In relativity, each observer brings their own frame, and differences between them are reconciled through Lorentz transformations.
But what is a reference frame ontologically?
In a relational model, we must ask: does the world contain reference frames, or do we enact them?
From Observer to Cut
Relativity is often misunderstood as “observer-dependent.” But in relational ontology, observation is not a passive reception of facts, but an active construal of potential. There are no observers in the classical sense — only cuts through a structured possibility space.
So when we speak of a reference frame, we’re not referring to a physical scaffolding “out there.” We’re referring to a semantic act: a perspectival cut that:
selects a construal of simultaneity
aligns spatial and temporal coordinates with a particular configuration
organises experience into a consistent set of meaning potentials
In short: a reference frame is not a coordinate system applied to reality. It is a construal system through which reality is selectively enacted.
Relativity without Observers
In special relativity, no frame is privileged. Events that are simultaneous in one frame are not in another. Velocities are relative. Durations dilate and lengths contract.
But these phenomena are not “effects” produced by motion — they are differences in construal. Each frame reflects a distinct perspective on the same relational system, with its own way of parsing the semantic topology of spacetime.
The Lorentz transformations don’t just convert between numbers. They translate between semantic construals — between different ways of cutting the same field of potential into temporal and spatial axes.
Simultaneity as Semantic Configuration
Perhaps the most philosophically jarring implication of special relativity is the relativity of simultaneity. Two events that are simultaneous in one frame may occur at different times in another.
But simultaneity, on this view, is not a brute feature of the universe. It is a semantic configuration: a way of organising the temporal dimension of experience relative to a given cut. There is no “objective now” to locate. Only different cuts through spacetime, each real in its own construal.
This does not make reality “subjective.” It makes it perspectival — structured, not by independent objects in space, but by systemic orientations toward meaning.
The Inertial Frame as a Semantic Default
In classical mechanics, an inertial frame is one in which objects move at constant velocity unless acted upon. But in our model, this is not a metaphysical baseline — it is a default construal: a systemic configuration that construes potential motion without imposed curvature.
Acceleration, then, is not a force experienced by a body, but a semantic deviation from this construal baseline — a departure from the default semantic alignment.
Even gravity, in general relativity, is no longer a force, but a curvature of the relational field. In relational terms, this curvature is a non-uniform construal of temporal and spatial possibility: a differential in semantic orientation across the field.
The Referential Act
Ultimately, to adopt a reference frame is to perform a referential act: to cut the relational field such that a particular construal of time, motion, and event structure is made possible.
There is no frame-independent reality beneath these construals. The field is not “obscured” by perspectives. It is the system of perspectives.
And so, reference frames become not scaffolds, but instances of system: situated enactments of a structured field of semantic possibility.