E75:Consciousness Research- Is the Brain a Generator or Signal Receiver?

To understand the signal receiver model, we have to start with William James.

James was an American philosopher, physician, and psychologist.

He co-founded pragmatism and established one of the first psychological laboratories in the United States at Harvard.

Because he was trained deeply in both medicine and philosophy, he evaluated the mind-body connection with scientific rigor, combined with a remarkably open mind.

In 1898, James delivered his famous Ingersoll Lecture at Harvard called Human Immortality; Two Supposed Objections to the Doctrine.

He set out to tackle the dominant scientific assertion of his day, the claim that thought is a function of the brain.

Physiologists argued that because brain injury, disease, or drugs clearly alter mental function, the brain must produce consciousness, and therefore, when the brain dies, consciousness must be permanently destroyed along with it.

James accepted the empirical fact that consciousness is functionally dependent on brain states, but he identified a massive logical flaw in the materialist argument.

He pointed out that functional dependence does not automatically mean production.

To prove this, James outlined three distinct types of physical causation.

First is productive function or the brain generator model.

Here, the physical hardware directly manufactures the output.

Think of steam from a tea kettle, electric light from a circuit, or power from a waterfall.

If you break the hardware, the output stops permanently because the machine produced it.

Second is permissive function, where a mechanism releases pre-existing stored energy, like pulling a trigger to release a crossbow, and third is transmissive function or the signal receiver model.

Here, the physical hardware channels, conditions, or restricts an external source that exists completely independently of the machine itself.

James used two vivid analogies directly in his lecture.

One, a stained glass dome.

James quoted the romantic poet Percy Shelley's Adonais, "Life like a dome of many colored glass, stains the white radiance of eternity." James suggested that raw universal consciousness fills the cosmos, but our physical brains act like colored glass, filtering and restricting that absolute light into individual human thoughts.

If you shatter the glass, the light isn't destroyed.

It simply returns to its unfiltered state.

Two, the pipe organ.

James noted that the keys and pipes of an organ channel pressurized air into musical notes.

The organ doesn't manufacture the air.

As James put it, "The air is not engendered in the organ.