Relational Meaning as a Necessary Condition for Physical Content
The Distinguishability Principle: Why Meaning Requires Difference
One of the simplest questions in physics may also be one of the deepest:
What makes something meaningful?
At first glance the answer seems obvious. A distance is meaningful because it tells us how far apart things are. A duration is meaningful because it tells us how long something lasted. Information is meaningful because it tells us something we did not know.
But look more closely and a pattern begins to emerge.
Distance only has meaning when there are at least two locations to compare.
Duration only has meaning when something changes.
Information only exists when there are alternatives.
Probability only makes sense when there are competing possibilities.
In every case, meaning seems to arise not from isolated things but from differences between things.
This observation lies at the heart of a new paper in the VERSF programme called The Distinguishability Principle.
The central idea is surprisingly simple:
A quantity acquires operational meaning only when it participates in a distinguishability relation.
In plain English, if nothing could ever tell the difference between two situations, then that difference carries no physical meaning.
The paper develops this idea into a formal framework and shows that many familiar features of physics follow naturally from it. The relativity of position, velocity, scale, and even global quantum phase can all be understood as consequences of a deeper rule: only differences that can, in principle, be distinguished matter operationally.
One of the most striking results is the explanation of why pairwise structures appear so often throughout the VERSF programme.
Distinguishability is fundamentally a comparison between two states.
A single state carries no distinction.
The smallest possible meaningful structure is therefore a pair.
This helps explain why pairwise constructions repeatedly appear in Distinguishability Geometry, probability theory, commitment dynamics, temporal emergence, and information theory. The recurrence is not a coincidence. It is a consequence of the fact that meaning itself begins with difference.
The paper also argues that distinguishability sits even deeper than information.
Information theory normally starts with a collection of alternatives and asks how much information they contain. The Distinguishability Principle asks a more fundamental question:
What makes those alternatives count as different in the first place?
From this perspective, distinguishability comes before information. Before anything can be counted, measured, or assigned a probability, there must first be a distinction.
Perhaps the most intriguing discussion concerns the nature of particles themselves.
Modern physics already tells us that particles are not tiny self-contained objects. Electrons, for example, are excitations of an underlying field. The paper pushes this idea further and suggests that particles may be better understood as stable patterns of distinguishability rather than as individual things.
A useful analogy is a musical note.
When a pianist plays middle C twice, the second note is not a copy of the first. The first note has already vanished. What returns is the same pattern, newly instantiated.
On this view, particles may be similar. What persists is not an underlying object but a reproducible relational structure. Identity belongs to the pattern, not to a hidden substance beneath it.
The paper stops short of claiming this as proven physics, carefully distinguishing between operational results and philosophical interpretation. But it points toward a provocative possibility:
Perhaps the universe is not fundamentally made of objects connected by relations.
Perhaps it is fundamentally made of relations from which meaningful objects emerge.
The paper’s concluding message is both simple and far-reaching:
Existence may be absolute.
Meaning is relational.
For decades, information has been regarded as one of the most fundamental ideas in science. But information may not be the deepest layer. Before a system can contain information, there must first be distinguishable alternatives for that information to be about. A universe containing only a single undifferentiated state would contain no information because there would be nothing to compare, count, or distinguish. Distinguishability therefore appears to sit beneath information in the hierarchy of explanation. Information is the bookkeeping of differences. Distinguishability is the existence of differences in the first place.