A radio goes silent when its circuitry fails. That observation tells us the circuitry matters; it does not, by itself, locate the source of the broadcast. We identify a real transmitter by finding a signal, measuring its properties, and showing how a receiver responds to it. The attractive image of a brain tuning into consciousness needs an equivalent account before it can become a physical explanation.
This final article in the Brain as Broadcast Receiver series examines that missing step. Earlier installments introduced receiver imagery, electromagnetic fields, predictive processing, and communication between people. These subjects can inform a question about consciousness without jointly establishing that consciousness arrives from outside the brain. The distinction is between a metaphor that helps us imagine a possibility, a philosophical position that proposes what reality contains, and a model with predictions that observations can test.
What the radio image gives us
The image makes a particular possibility easy to picture: a device might shape an output without originating everything that appears in it. It also invites a question about dependence. If a damaged receiver produces distorted sound, dependence on the device need not imply that the device created the transmission.
But an analogy supplies its own machinery for free. Radios have antennas, transmitted signals, measurable frequencies, and circuits whose responses can be investigated independently. Calling the brain a receiver does not identify corresponding features. What is received? Where is its source? How does it interact with the brain? Which observation would differ if the brain organized experience through its own activity instead?
A productive metaphor leads to those questions. If every possible observation can be redescribed as successful reception, blocked reception, or altered tuning, the image has become difficult to test. Its flexibility is a limitation of the explanation, even when its imaginative appeal remains.
Consciousness as fundamental is a family of positions
A view can take experience seriously as a basic feature of reality without picturing a cosmic transmitter. Panpsychism, cosmopsychism, and idealism are not interchangeable names for a broadcast mechanism.
In his handbook chapter on panpsychism and cosmopsychism, Yujin Nagasawa distinguishes an approach starting with phenomenal properties of individual things from one starting with the cosmos as a whole. The latter is a whole-first philosophical proposal. He also distinguishes attributing phenomenality to the cosmos from attributing divinity to it: cosmic experience need not entail a god. These are claims about the underlying character of reality, not reports of a detected signal. Read the original philosophical discussion, chapter 22.
The attraction is understandable. If experience is fundamental, a theory does not have to begin by obtaining it from ingredients described as wholly nonexperiential. Yet that starting point leaves further work. A small-parts-first account must explain how its starting properties relate to a person's unified experience. A whole-first account must explain why there are distinct perspectives: why your pain is yours and my view of this page is mine. Naming a cosmic subject does not answer that question.
Idealism makes a different commitment about the primacy of mind. It likewise needs an account of the world we share and the perspectives within it. None of these labels alone specifies a frequency, a receiver, or a measurable exchange. A physical reception theory would require additional claims, and those claims would need their own support.
A brain field is not automatically a cosmic field
Johnjoe McFadden's conscious electromagnetic information, or CEMI, theory proposes that consciousness involves physically integrated, causally active information in the brain's electromagnetic field. His 2020 paper presents an argument for this brain-local account and identifies untested predictions. The proposal concerns a field generated by brain activity; it does not require an external conscious transmitter. Read the author's abstract.
That distinction changes how the broadcast image should be used. A theory about the brain's own field and a theory about receiving consciousness from elsewhere are different hypotheses, even though both use the word “field.” Evidence supporting some role for a local field would not, by that fact alone, establish the external source.
The same care applies to information. A mathematical quantity can describe a property specified by a model. To treat it as a measure of experience, we must justify the connection between that property and experience. Calling information integrated does not bypass that task, and it does not make a cosmic interpretation necessary. The Theory of Consciousness reading path examines several competing approaches and the evidence they seek.
Neural coupling has an ordinary communication pathway
A revealing example comes from a 2010 study by Stephens, Silbert, and Hasson. The researchers recorded a speaker telling a story during functional brain imaging, then played the recording to listeners whose brain activity was also measured. They found related activity patterns during successful communication. Controls included a story in a language the listeners did not understand. The experiment investigated speaker–listener relationships through recorded speech, rather than direct electromagnetic transmission between minds. Read the original study.
The recording is the consequential detail. The listener received sound carrying a story. Related responses can therefore be studied through an identifiable sensory route. The experiment does not become a test of telepathy or a shared cosmic consciousness merely because the responses are described as coupled.
Nor does this reduce communication to something uninteresting. One person can arrange words so that another follows a remembered event, anticipates a development, or misunderstands a turn. Studying the relation between those responses is already a substantial achievement. Adding an unmeasured transmission channel requires evidence beyond that achievement.
What would make the receiver claim testable?
Three kinds of explanation ask different things of their readers:
| Kind of claim | What it contributes | What would strengthen it? |
|---|---|---|
| Radio metaphor | An image for considering dependence and source | Clear correspondence and clear limits |
| Philosophical position | An account of what is fundamental | Explicit premises, arguments, and answers to its explanatory problems |
| Empirical receiver model | A proposed physical interaction | Defined variables and predictions that distinguish it from alternatives |
For a hypothetical receiver model, the next step would be to specify the proposed signal and predict a result that an alternative model would not expect. A study would need to account for ordinary sensory communication, shared stimuli, measurement artifacts, and other explanations relevant to its design. The prediction and evaluation criteria should be stated before the result is interpreted. This is a research requirement, not an experiment conducted here.
A report of unity or expanded awareness poses another kind of question. It can establish what someone reports experiencing. Moving from that report to a claim about the source of all experience requires a further argument and independent support for any proposed physical mechanism. The intensity or importance of an experience cannot perform that additional work alone.
Leave the question open without lending it borrowed proof
The receiver image does not establish survival after death, a way to build a conscious machine, or a cosmic purpose. Each would require premises and evidence beyond an analogy. Nor does an unresolved account of consciousness automatically select the receiver proposal from its competitors.
We can still examine the possibility with curiosity. The constructive move is to keep its claims distinct: a philosophical case for fundamental experience, a theory of brain organization, and a proposed external signal each face different questions. Whatever view we favor, other people's welfare and consent remain responsibilities we can address without first settling the metaphysics of the universe.
The antenna question becomes sharper when the imagined transmitter stops being an answer supplied by the image. Identify what the proposal predicts, what its rivals predict, and which observation could separate them. That is where an evocative possibility can begin to earn explanatory weight.
Start the five-part series with The Radio in Your Skull.
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