Is a promise truly a weightless ghost directing the dance of atoms, or have we simply been misled by our own vocabulary? The compelling allure of Compton’s Problem rests on a category mistake: it treats "meaning" as an independent, non-physical entity that somehow reaches down to pull the levers of the material world. By framing the debate as a struggle between blind physicalism and abstract agency, we ignore how complex physical systems actually process information.
## The Information-Processing Fallacy
The claim that abstract meanings causally influence physical events relies on a false dichotomy between brute physics and disembodied semantics. In reality, a promise is not a non-physical entity. It exists concretely as a highly structured configuration of neural pathways, synaptic weights, and electrochemical states within a brain.
When Arthur Compton traveled to Yale, his body was not steered by an abstract concept. It was directed by a physical brain executing a complex, internalized program. Just as a computer executing software does not violate the laws of physics to run a program, a human brain does not require "meaning" to act as a non-physical steering wheel. The software's "meaning" is entirely identical to the physical routing of electricity through silicon.
In his landmark book *Darwin's Dangerous Idea*, philosopher Daniel Dennett argues that treating abstract meanings as independent causal agents is an unnecessary mystification of physical processes:
> "There is no scaffolding of meaning that exists independently of the physical structures that implement it. We do not need to posit a separate realm of 'meanings' to explain why an organism behaves as it does; we only need to understand the design history and physical architecture of its information-processing systems."
> — [Daniel Dennett, *Darwin's Dangerous Idea*](https://en.wikipedia.org/wiki/Darwin%27s_Dangerous_Idea)
## Epiphenomenalism and the Closed Physical Universe
To argue that the *content* of a promise must have independent causal power is to violate the principle of the [causal closure of the physical](https://opil.ouplaw.com/display/10.1093/acprof:oso/9780195113709.001.0001/acprof-9780195113709). If non-physical meanings can alter physical trajectories, they must introduce new energy or alter physical forces without a physical source.
If we changed the promise from "Yale" to "Paris," we would change the physical ink on the paper or the sound waves in the air. This change in physical input alters the physical sensory organs of the recipient, leading to a different physical configuration in the brain. The physicalist does not need to deny that the "content" matters; rather, the physicalist rightly points out that "content" is simply our shorthand description for these highly specific physical configurations.
## Eliminative Materialism: Dissolving the Problem
Rather than solving Compton's Problem, thinkers like Patricia Churchland suggest we must dissolve it. In [*Neurophilosophy*](https://mitpress.mit.edu/9780262530859/neurophilosophy/), Churchland argues that folk-psychological concepts like "promises," "beliefs," and "meanings" are clumsy, pre-scientific terms that will eventually be replaced by precise neuroscientific descriptions.
What we call "understanding a promise" is actually a specific state of neural plasticity. The physical journey to Yale is fully explained by the causal chain of neurobiology, leaving no room—and no need—for abstract entities to exert a spooky, downward causal influence on our molecules.
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