When
we seek indefinite life, what is it that we are fundamentally
seeking to preserve? I begin by observing that I perceive the
world as myself – Gennady Stolyarov II – and not
as any other person. That is, while I may be able to envision
another person’s perspective, I cannot directly assume
another person’s physical sensations and thoughts; I cannot
become another person. At the same time, my own sensations and
thoughts, as I experience them directly, are what constitute
my being, or -- since ‘being’ is too general a term
– my I-ness.
Consider
what would happen if a scientist discovered a way to reconstruct,
atom by atom, an identical copy of my body, with all of its
physical structures and their interrelationships exactly replicating
my present condition. If, thereafter, I continued to exist alongside
this new individual -- call him GSII-2 -- it would be clear
that he and I would not be the same person. While he would have
memories of my past as I experienced it, if he chose to recall
those memories, I would not be experiencing his recollection.
Moreover, going forward, he would be able to think different
thoughts and undertake different actions than the ones I might
choose to pursue. I would not be able to directly experience
whatever he chooses to experience (or experiences involuntarily).
He would not have my I-ness -- which would remain mine only.
Now
suppose that instead of GSII-2 being my contemporary, he was
created in some dystopian future where I had already died of
some misfortune or another, but someone found a way to reconstruct
the latest healthy state of my body, including my mind, atom
for atom. The situation with regard to preservation of my self
would not change; GSII-2 would be able to live as if he had
my past knowledge and experiences -- but my I-ness would still
be gone; it would not transfer to him simply because the original
Gennady Stolyarov II had died. Indeed, the I who had died would
never be aware in any manner of GSII-2’s existence or
any experiences he might have in this future time.
What
is, then, this I-ness which can be preserved through some transformations
and not through others? For instance, it is true that every
atom comprising one’s body now is not the same as the
corresponding atom that comprised one’s body seven years
ago. Nonetheless, if one remains alive, one’s I-ness is
clearly preserved. How can that be? It is so because the replacement
does not occur all at once. Rather, at any given time, only
a small fraction of the atoms in one’s body are being
replaced as old cells and their components take in energy, replicate,
die, and are replaced by others. Thus, the continuity of bodily
processes is preserved even as their physical components are
constantly circulating into and out of the body. The mind is
essentially a process made possible by the interactions of the
brain and the remainder of nervous system with the rest of the
body. One’s I-ness, being a product of the mind, is therefore
reliant on the physical continuity of bodily processes, though
not necessarily an unbroken continuity of higher consciousness.
This can shed some light on which situations would allow for
the preservation of one’s I-ness and which would not.
SITUATIONS
THAT ALLOW FOR PRESERVATION IF I-NESS
Sleep
– Sleep is often not even a suspension of consciousness;
dreams, for instance, are instances of the consciousness turning
in on itself, examining and remixing data that have already
been absorbed from the external world. Deep, dreamless sleep,
where the passage of time is not noticed by the sleeper, also
does not involve a cessation of bodily activity -- and certain
subconscious areas of the brain continue to work during it as
well.
General
Anesthesia – General anesthesia induces a temporary completely
unconscious state in a patient, but it does not shut down the
body completely; essential mechanisms, including the heart,
continue to operate. Consciousness that is suspended and then
revived, with the other bodily processes having remained continuous
in the meantime, will not become an entirely different consciousness
with a different I-ness but will rather preserve its previous
I-ness. Having once been under general anesthesia, I can say
with certainty that my I-ness had not been terminated in the
process.
Comas
and Vegetative States – During a coma or a vegetative
state, basic, largely involuntary, bodily processes continue
to function. If full functionality of the brain is eventually
restored, the underlying system in which the I-ness emerges
would still have functioned uninterrupted in the meantime. Some
recovered coma patients, however, have also reported being aware
of their surroundings during the coma, suggesting that aspects
of higher consciousness can also be preserved without interruption
in such a condition.
Rescues
from the Brink of Death – Situations where individuals
have had close brushes with death may involve cessation of functionality
for some bodily systems but not for all. At least with current
technology, the affected systems can only be restarted because
some of the body’s systems have not yet completely failed.
This means that nothing about such experiences would preclude
the continuity of one’s I-ness.
Incremental
Organ Replacement – An artificial organ that is incorporated
into a functioning bodily system will not disrupt the continuity
of that system. Before, during, and after the transplant, the
body continues to execute numerous important functions, and
the new organ -- provided that the transplant is accepted by
the body -- becomes just a new part of the same continuous system.
As with atoms all being replaced over time, it is at least conceivable
that -- via a series of gradual replacements -- all of a person’s
organs, including the brain, could be exchanged for artificial
varieties without disrupting the continuity of that person’s
identity. This, of course, would only be the case provided that
the organs were replaced one or a few at a time. With replacing
the brain in this fashion, particular care would need to be
taken to ensure that the replacement is not a situation of simply
taking out the existing brain and putting a new one in its place.
Rather, the new brain would need to start as an addendum to
the existing brain, so that the existing brain could integrate
its contents with the new brain before parts of the existing
brain (for instance, a physically diseased or irreparably damaged
brain) are taken out of commission. If a gradual replacement
is performed, it might even be possible for an individual to
eventually have a fully electronic brain that still preserves
that individual’s I-ness.
SITUATIONS
THAT WOULD NOT PRESERVE I-NESS
Reanimation
After Full Death – Suppose, instead of creating an identical
atom-for-atom replica of a dead individual, that individual’s
fully dead corpse were instead exhumed and rehabilitated by
restoring all bodily systems to a functional level and in configurations
exactly replicating the dead individual’s last healthy
state. While, here, the individual’s actual body would
be worked on, in terms of the preservation of I-ness, this situation
is no different from the case of a perfect replica of a deceased
person having been made from scratch. The reanimated individual
would possess the knowledge and memories of the dead individual,
but the dead individual would not be aware of the reanimated
individual’s existence and would not experience the reanimated
individual’s subsequent interactions with the world. There
may, of course, be tremendous value for others in reanimating
already dead people, as the reanimated individuals’ personalities
and mental states (shaped by the dead individuals’ actual
past, which the reanimated individuals would perceive the illusion
of having experienced) could be invaluable in improving the
world. Moreover, the reanimated individuals would certainly
be happy to be alive and would be as fully human and entitled
to the same rights as would have been the dead individuals on
whom they were modeled. However, while the reanimation of already
dead people would be a fascinating breakthrough, it would do
nothing for preserving the I-nesses of those who had already
died.
With
practices such as cryonics -- where the hope is to eventually
reanimate currently clinically dead individuals by placing their
bodies in biological stasis in the meantime -- the issue of
whether I-ness would be preserved is a bit more challenging
to address. Cryonics relies on the premise that the current
definition of death -- based on what situations of bodily decay
today’s medicine would be able to reverse -- would not
be the same as the definition of death prevalent in the future,
when many more conditions would hopefully be reversible. If
an individual who is clinically dead by today’s definition
but would not be clinically dead by a future definition is frozen
today in a particular condition, the hope is that future technologies
would -- even by their routine application -- be able to revive
that person. However, in order to accomplish the preservation
of the body up to that time, cryonics relies on suspending the
physical processes within the body as much as possible. If these
processes were not suspended, then their natural operation would
lead to further decay of the body to the point where it might
be extremely difficult or impossible to recover even using future
technologies. While the cryonically preserved individual is
not fully dead, at least under a future definition, it is not
clear what the implications of putting an entire body (including
all physical systems, not just some) in stasis and later reanimating
that same body would be for the preservation of I-ness. Moreover,
I can only speculate as to whether cryonic preservation would
still involve some extremely low-key uninterrupted functioning
of bodily systems -- or whether it would require a complete
shutdown of all systems. In the latter case, a cessation of
I-ness would appear to be much more likely than in the former.
Uploading
of Consciousness – Particular caution should be taken
with regard to any proposals to upload an individual’s
mind, personality, or memories onto a computer or an Internet-like
network. I can conceive of ways where such uploading might be
safe with regard to not disrupting an existing I-ness, but I
strongly doubt that the uploaded consciousness could serve as
itself a perpetuator of the same I-ness. Assuming that it would
become possible to encode all the information in a person’s
brain in a similar manner as files can be written to a portable
drive and then copied to a computer, this would only create
a copy of mental configurations. That copy might even have advanced
interactive functionality, but it would not and could not replace
the person of whose mind the copy was made. This situation might
even be compared to the simultaneous existence of an individual
and an identical replica of that individual in the body; just
as these two people would have two different I-nesses, so would
the original bodily consciousness of the individual whose mind
had been uploaded have a different I-ness from the I-ness of
the uploaded mind (and I do not rule out the possibility of
a non-organic entity of sufficient complexity being self-aware).
The
uploading situation I described is similar to making an interactive
archive of one’s mind -- which might, in its more advanced
implementations, also be self-aware. I recognize numerous potential
benefits to such an approach, provided that it does not destroy
or presume to replace the bodily mind which is being uploaded.
The much more dangerous version of the uploading ambition perceives
the uploading as a sort of migration of the consciousness from
a corporeal (be it organic or inorganic) environment to a virtual
environment. Any cessation of the corporeal person’s bodily
processes as a consequence of such a migration would destroy
that person’s I-ness – just as dying and having
a bodily replica of oneself built afterward would. It would
be tragic indeed if people for whom indefinite self-preservation
is the foremost goal inadvertently destroyed their essential
vantage points in the attempt to perpetuate them.
Merging
of Consciousnesses – Some futurists have expressed the
desire to eventually connect multiple individuals’ consciousnesses
via electronic means -- much as computers can be connected to
one another. Such connections are supposed to facilitate individuals’
abilities to sense directly the experiences of the other individuals
to whom their minds are connected. But such an undertaking --
depending on how it is implemented -- may also have destructive
effects with regard to the I-nesses of the individuals being
connected.
I can
conceive of two qualitatively different scenarios where individual
consciousnesses might be connected. Scenario 1 would appear
to be innocuous. To understand how it might work, suppose that
it became possible to upload copies of an individual’s
thoughts and experiences onto a portable medium -- much as one
might upload a file from a computer onto a portable drive without
destroying the original file. If it becomes possible to directly
convey thoughts and experiences in an electronic medium, then
such copying and transfer from one mind to another might also
become possible. Taken one step beyond a portable medium that
can be plugged into one conscious system and then transported
to another, one might envision a more continuous mechanism for
doing so -- similar to a wireless Internet connection over which
information is transferred. But it is important to recognize
that, while this linkage might enable Mind X to experience what
Mind Y experiences, the two experience sets would still be perceived
by the separate I-nesses of Mind X and Mind Y. If Mind Y obtained
the experiences of Mind X and Mind X were to be physically destroyed,
the I-ness of X would not be transferred to Y. This scenario
has a parallel in currently available technologies such as explorer
robots which have entered narrow shafts in Egyptian pyramids
and traversed the surface of Mars, sending back continuous live
images of what their cameras recorded. These images enable a
human observer to experience the environment of the robot without
being in that environment. However, if that robot were instead
a conscious being, the transmission of images and even other
sensory stimuli from this being would not equate to an extension
of the being’s I-ness to the observer. This scenario would,
presumably, allow for each individual participating in the sharing
of information to select which information to share or to keep
to oneself, much as a computer connected to the Internet does
not need to share all of the files on it with other computers
in the network.
However,
another scenario – call it Scenario 2 – with regard
to merging consciousnesses could not avoid destroying the I-nesses
of those involved. This scenario would constitute a complete
merger, where the aim is for every consciousness to be able
to directly assume the vantage point of every other and to control
the actions of the others directly -- without any meaningful
separation possible among the minds involved. If two I-nesses
were to merge in this manner, then they would probably become
a single I-ness based on the combined sensations of the previous
I-nesses. But, just as mixing two fruits together in a blender
and separating the results into two halves would not yield the
original fruits, neither would combining two I-nesses and then
separating them (assuming this would be technically feasible)
result in the original I-nesses. At best, there would be two
hybrid I-nesses and, at worst, no I-nesses at all, because the
new combined I-ness might be destroyed by division just as the
I-ness of every biological individual today would be eliminated
via any attempt to split it into components. Every human observation
and experience to date suggests that the human individual is
the basic unit of rational, conscious activity -- and that physically
separating the mind into sub-components destroys the emergent
system of rational consciousness. If the desire is to preserve
the individuality of each person -- which necessarily implies
preserving that person’s self-awareness and vantage point,
as directly experienced by that person -- the kind of merging
involved in Scenario 2 should be avoided as contrary to that
aim. However, the file sharing situation of Scenario 1, where
each I-ness remains compartmentalized within the individual
and experiences are only shared at each individual’s discretion,
might be a useful and, if safety precautions are taken, harmless
future means of extremely direct communication.
TRUE
PRESERVATION OF SELF
Where
does this discussion leave the advocates of literal -- as opposed
to figurative -- immortality who are interested in preserving
the actual I-ness of each individual, as opposed to simply a
memory or record of that individual, however complete and interactive
-- or creating a functioning replica of that individual in the
future? Two general conclusions can be drawn which, while they
may be considered somewhat grim, can guide the quest for genuine
immortality.