Think of the fact that a deaf person cannot hear. Then, what deafness may we not all possess? What senses do we lack that we cannot see and cannot hear another world all around us? Frank Herbert
Arun Kumar
Arun Kumar + AI
Biological organisms, including you and me, need mechanisms to sense their environment and capture information that is available in various forms. If they do not, they might as well be rocks and stay at one place.
In the context of this discussion, information is bits of facts that can convey characteristics (or properties) about the environment. These facts can enable the assessment of the state of the environment, and in response, can be used to alter behavior.
For a biological organism, the need for gathering information is essential to know, and to adjust according to the properties of the environment they live in. Mechanisms to take in the information are necessary for their survival and for successfully competing for resources that are up for grabs.
Information, therefore, is factoid about the state of the environment at point A where it originates and travels to point B, and along its passage, carries a signature of what was happening at point A where and when it originated.
The transfer of the fact from point A to point B needs to be in some form of carrier that can travel between the two points. Carrier could be waves — electromagnetic waves, gravitational waves, compression waves etc., fields — electric, magnetic etc., medium properties — molecules etc., physical contact — touch etc.
At point A sits the source of information. At point B there is a mechanism that receives the information. The information could be encoded at its sources, and if so, it needs to be appropriately decoded at point B where it is received.
In summary, learning and reacting to the state of the environment requires a modality to carry the information, a source, and a receiver of the information, and possibly, the encoding and decoding of the information.
The environment I live in is permeated with the carriers of environmental information — electromagnetic waves, sound waves, magnetic and electric field, molecules, pressure, temperature. Biological organisms can exploit all these carriers of information to learn about the state of the environment and exploit that information and benefit from it for their survival.
Somehow natural selection by trial and error, and by amplification of chance happenstances, has figured out how to tap into carriers of information that travel through the environment I live in.
My capacity for vision is plugged into electromagnetic radiation as the carrier of information about the state of the environment. My capacity for hearing taps into compression waves. Smell and taste are tuned to either molecules floating in the air or to objects that are put inside my mouth. My sensitivity to touch helps me interact with my environment, perform delicate tasks, and detect harmful stimuli.
The information gathered by my senses is carried to the brain, where based on the memory from similar experiences from the past, is interpreted. If past analogs do not exist, the information is analyzed as a novel experience (and is also stored for later use). Either way, once an interpretation is made, the brain sends a signal back to one of the body organs to react — run if information resulted in an inference of danger, engage if it has a potential for benefit (e.g., a smell for food).
There are also carriers of information about the state of the environment to which I am not sensitive. I never developed senses to that are receptive to the Earth’s magnetic field that aid birds in their navigation,
In certain locales, some classes of carriers are missing and corresponding sensors and receivers have not evolved. Moles and fishes living in dark caves never developed senses that are receptive to electromagnetic radiation. Doing so would be a waste of resources. Instead, they rely on other senses that may be much more sensitive than I.
A curious fact about single cell organisms is that they sense their environment, and direction, is via chemical gradients. Our immune cells figure out the site of infection using the same mechanism — whichever direction there is propensity of signaling proteins (e.g., cytokines) tells the immune cells which way to travel to.
The miracle story in the development of senses is also the fact that none is predetermined.
Development of appropriate senses to get an edge in the war of survival depended upon the environment the biology evolved in. No electromagnetic radiation, well, there is no need for developing sensory organs for vision.
The complementarity of senses and presence of carriers of information is not a story of a hole fitting the puddle, but it is the other way around. A carrier of information exists, and natural selection figures out what senses would be useful (and will enhance the chance of survival).
Another miracle to think about how it all must have started.
As it is not by design, the development along the pathways for senses must have started by chance happenstance. At some point, a proto-organ to sense a carrier, and to benefit from the inferred information, developed. A small bit of evolutionary advantage it gave, via positive feedback, snowballed into the sensory organs I currently possess.
Perhaps, it is the same story for the development of consciousness. Whatever the biological, psychological, cognitive, social markers of consciousness may be, their development may have followed a similar pathway. A nascent capacity for proto-consciousness, a survival advantage associated with it, and positive feedback leading to the capacity of consciousness (that also has the capacity to question itself).
I guess, learning about the development of senses has lessons to also teach us about the development of consciousness.
Ciao, and thanks for reading.