The answer to
this question is maybe. There are many factors that come into play when trying
to answer a question like this which pertain subjects like religion, philosophy
and engineering. In order to answer this question one must understand what life
and consciousness are, what makes a person a person and search the
technological advances, which will aid the process.
It
is hard understand what exactly consciousness and identity are. Evolutionary
biologists suggest that consciousness arose in order to help a human plan for
the future. Strangely enough, it is remembering the past that taught us predict
the future. By learning how to store memories, a human mind learned how to
predict future, based on the past events. That is also why we have imagination.
One side effect of it is that sometimes we don’t remember past events
correctly. Like Ronald Reagan who thought that his ancestors died in the Alamo.
Biologists argue that having memories of the past events by itself is quite
useless, we only have memories to use them as a template for the future. That
is why we sometimes confuse thoughts and dreams with reality. The part of the
brain that is responsible for predicting the future is the frontal lobe. The
frontal lobe in the brain is possibly the only reason why we are able to go on
the Internet and fly across the globe as opposed to running around in the
jungle.
It
seems weird for us that the brain is us, it seems that we are an entity stuck
in this body. We believe that we are free to do anything and that we are in
control of our lives. Unfortunately that is not the case. Our brain works in a
such way that anyone who studies it is at first in disbelief. There have been
cases when a people were unable to recognize faces because a part of their
brain that is responsible for face recognition doesn’t “work”. Another case
reports a man who is unable to recognize objects, he sees them the same way as
we do, but he doesn’t comprehend what they are, he understand the concept of an
object. The reason once more is that the part of the brain responsible for
object recognition doesn’t “work”. Some paralyzed people act like their body
parts can work, not because they lie, but because they really do believe that
their limbs work. When asked to move an object, they usually come up with an
excuse such as “oh i didn’t feel like using my hand”.
Following
this logic, one can say that it is not us who controls our brain, but the brain
that controls us. But then again, we make a distinction between us and the
brain, because that’s the way it seems to us, which is incorrect.
Now
since the brain is us and we are the brain, assuming that it would be possible
to replicate, modify or download the information from our brain, we could
suddenly be somewhere else. To be more specific, let’s assume that
bioengineering scientists have come up with artificial neurons, which are
exactly the same as the ones in the brain. Now one by one, we extract a neuron
from the brain and replace it with the artificial one. Since we are replacing
them one by one, the flow of consciousness is not affected. The person is aware
of themselves and the surroundings. The question now lies, now that each neuron
in the person’s brain has been replaced, is it the same person?
This
thought experiment has existed for centuries, and has been known as the Theseus
Ship. In that thought experiment Theseus has a ship, in which each part is
gradually replaced one by one until each part is replaced. The question then
lies, is it still Theseus’ Ship? Similarly, is the person whose neurons have
been replaced still the same person? Well, it is impossible to answer the
question, because there is no real answer. Some argue that since there was no
stopping in the flow of consciousness, the person is the same. However, if the
person was put to sleep and had the neurons replaced then a new person would
wake up.
That
is not the only way one could become immortal. The brain could be potentially
uploaded to a computer and therefore reach immortality. To understand this
concept, one must first be acquainted with the Brain in the Vat thought
experiment. Imagine a crazy scientist, who has advanced technology. The crazy
scientist kidnaps a person and extracts their brain. He puts it in a vat and
connects cords to his brain, which imitate the stimuli the brain receives from
the body. The cords are
connected to their brain in such a way the computer gives their brain images,
sounds etc. So the question is, is their reality any different from ours? Is it
possible that you, the reader are really in some crazy person’s lab and
everything is just an illusion created by the computer. And although it is fun
to entertain such ideas, one must understand the purpose of this thought
experiment. Everything we hear, feel and see are just what our brain tells us
what they are. The colors are the way the brain tells us. What if all of us see
the colors in a different way but call them the same names? The space around is
mainly empty, there is much more empty spare in a solid object than particles.
If our brain saw the world the way it is described in physics, we would mainly
just see empty space around us, but that would be evolutionarily disadvantageous. These questions and ideas have no answer and its doubtful if they ever
will be answered. We cannot know what its like to be another person or a
creature. We will never comprehend how bats can see through sound and whether
our pet is conscious.
Therefore
downloading the brain into a computer is very plausible. With computer
simulating the stimuli that are sent to our brain, we could live in a world created
by the computer. In a utopia where anything we want will appear in front us
just when we wish it to. However some will argue that that is worse than death.
A life where there is no incentive to work is meaningless. Furthermore,
religious people look forward to meeting Saint Peter at the gates of Heaven or
reincarnating into a different living object.
The
other solution to this problem is be to connect the computer brain of a
person whose brain has been downloaded, into to a robot body. In other words,
the brain of a human is downloaded into a computer in which the person is still
consciousness. And then, instead of connecting cords into the brain in order to
simulate the reality, the cords are connected to artificial body and head with sight and hearing. In a
weird way, it is transforming a human into a robot, but assuming that the robot
body looks exactly like a human one, that person/robot would be able to lead a
normal life. Here's a video of a robot being controlled by brain cells of a rat grown in the lab:
And
although this solution seems to work, it also opens a metaphysical can of
worms. Let’s assume this: a person who is thought to be dead has his brain
downloaded into the computer. A few hours later, a miracle happens and the
person comes back to life. So now we have a consciousness in the computer and
in the person. One consciousness becomes two, and is it not the proof that the
computer consciousness is not the “real” consciousness? Well, once again, it
depends on one’s definition of consciousness. Philosophers claim that a human,
what makes you, you, is the experiences. So in that way, both are just as real,
and both are the same person.
Another interesting scenario appears if we
imagine that two brains are downloaded into the same computer. In that way, who
is the computer and how will these two consciousnesses work together? Will that
combined one person go crazy? Will one consciousness take over the other, or
will this strange situation create a synergy in which both consciousnesses gain
from such an experience?
One
could also study consciousness by looking at the animals. Are animals
conscious? It is highly doubtful that a slug is aware of its existence, but a
chimpanzee isn’t (chimpanzees can recognize themselves in the mirror). Does a dog suffer or simply feel the pain without understanding
what it really is? When a predator corners the horned lizard, it uses the
defense mechanism that is wired into its brain. It squirts blood out of its
eyes to distract the predator and get away. The lizard doesn’t really understand
what it’s doing. It is in its genes, which over millions of years formed in a
way that would be most efficient for the lizard to survive and pass on its
genes.
And
although we consider ourselves to be conscious and in control of our bodies,
that is not always the case. Evolutionary biology suggests that our behavior
can be explained by evolution. We do things in a certain way because back in
the hunter-gatherer times, it was the only way to survive. If you are faced
with a huge lion in front of you, you will immediately enter the fight or flight
mode, meaning that either you will fight the lion or run away. At the same
time, adrenalin will be released into your blood to give extra strength,
sweating will cool down the body temperature as physical action raises it, and
other changes in your body will happen involuntarily. Another example is when a
6-month old baby is shown pictures of people of his own race and a different one;
they will look longer at the picture of the person that is of the same race.
Evolutionary psychology affects us before we are even old enough to become
conscious.
A
good way to understand all of this is through yet another thought experiment,
known as the Chinese room experiment. Imagine a man who has been hired to a
Chinese company although he doesn’t know a single word in Chinese. His job
consists of sitting in a room that is completely isolated from everyone/everyone
else. He sits alone in a closed office, which has two openings in the wall. He
receives documents in Chinese from one of the openings. He looks at the
document and then opens a special book in which he has to match the characters
in the document with the ones in the book. After matching them, he writes
characters on the piece of paper based in the book. He works there for years,
and eventually the book is not even required. He becomes very efficient at it,
and knows exactly what to do once the documents come and does his work very
quickly. But he never understands what exactly it is that he is writing. That
is similar to consciousness. The process of the documents coming in and replies
coming it out is similar an organism receiving stimuli and responding to them. Animals
become better at things, dogs become trained, on top of evolution, training
modifies them to become more efficient, and yet the dog never understands why
exactly it is that it has to fetch the tennis ball. The stimuli coming in the
dog seeing the ball fly, and the dog’s response is to get it. The dog will
never comprehend what it does the same way the man will never comprehend what
it is that comes in and out.
So
yes, consciousness is extremely complicated, which makes immortality all more perplexing
and baffling. Immortality has been a dream of man for eras, and now it seems
that the dream can be achieved, but in a way no one could have predicted.
Technological advances will inevitably lead to more complicated computer
structures which one day may become AI and help us better understand a
consciousness. And yet there is still a chance that once the necessary
technology is there, it still won’t be “us” who live forever, but rather the
continuation of our consciousness (whatever that might mean to you). I can only
hope I live long enough to become immortal.
This is what the future might look like for us:
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