[Here's a Philosophy paper I wrote during my first semester of college. I wasn't that great at Philosophy, probably because I wanted to tackle these questions with sheer intellectual force rather than methodical reason...I guess you could call it a kind of brain–brawn? Anyway, I liked this paper, so here it is anyway.
B+/A-. The pictures were not included in the original paper...but you could have guessed that on your own, I bet.]
Kirk's Dilemma
Personal v. Animal Identity
[Short Round]
Philosophy 110a
December 10, 1996
I begin a sentence with the word "I." That single letter represents my identity and my self, of course, but does it refer to the same thing that it referred to when I first learned it, many years ago? Would it refer to the same thing if my brain were irreparably damaged and I forgot everything I had ever known, returning to a mental state comparable to that of infancy? If someone were to replace my mind with the mind of Bernard Williams, what would it mean if I wrote, "I begin a sentence with the word 'I'"? According to John Locke, personal identity consists of and is limited by consciousness: awareness of self and memory of past define the self. If I switched minds with Bernard Williams, the fingers attached to the body I previously inhabited would be typing the thoughts of Bernard Williams, and his mine, for each person's identity would exist wholly within the other's body. Locke contrasts his definition of personal identity with that of animal identity, which does not depend on continuity of memory. The distinction he draws there has been attacked by those who feel that identity is inherently attached to the body, those who believe that "replacing my mind with the mind of Bernard Williams" would be tantamount only to creating a serious delusion of psychosis within the two of us, causing us to type away out our respective computers convinced that we were someone else. The arguments raised against Locke's views do not disprove the distinction between animal and personal identity, but they do successfully challenge the assumption that personal identity is all that is significant to a person's self.

According to Locke, animal identity is defined by the physical: while molecules and other small particles of matter may shift and change, there exists a continuity of body with a continuous life, meaning that any particular body, although what it is made up of may change over time, exists as something different from other similar bodies, with its own life. A man possesses animal identity as well as personal identity, but those two concepts are fundamentally different. Personal identity, to Locke, involves consciousness and the ability of that consciousness to stretch into the past. The continuity of a person must be based on that person's memories, for Locke argues that there is no other way to define a person without allowing for the possibility that the entire population of the world is the same person or that change in physical shape changes identity as well (amputation of an arm should not, in most people's view of reality, be considered a fundamental change in personal identity). Locke's view of PI (personal identity) thus disproves the claims of any madman believing himself to be Napoleon, because unless he recalls everything that Napoleon ever experienced, how can he be in any way considered to be Napoleon, even if some manner of immaterial soul was indeed transferred from French general to madman? If the transfer of such an immaterial soul without memory constitutes transfer of identity, Locke reasons, it is equally valid to assume that the transfer of molecules from one body to another constitutes transfer of identity. Very few would reason that a person whose body is made up of molecules that once helped to make up the body of Adolf Hitler is, in fact, Adolf Hitler, even if, by some strange trick of chance, every molecule in that person's body had once been in Hitler's body. Even fewer would agree that this person should be held responsible for the Holocaust. While disproving claims of transferred identity, however, Locke's PI theory lends credibility to the hypothetical possibility of such a transfer. If identity consists entirely of consciousness and memory, then it is perhaps reasonable to say that a person whose mind is identical to that of Hitler's, a person who has all of Hitler's memories and thought processes, is Hitler and should be held accountable for the crimes of Nazi Germany.

That last consequence of Locke's distinction between PI and animal identity may seem troubling, but we should remember that it is entirely hypothetical, and we are assuming that this person with Hitler's mind does in fact have all of Hitler's memories, for some reason, and does not merely think that he does. One might argue that this poor soul still should not be held accountable, but who is actually being punished if this Hitler-person is found guilty for the crimes of Der Führer? We wouldn't punish Hitler's comatose body for what he did while conscious, and that very instinct to consider mind over matter, so to speak, is what should make us consider strongly the possibility that the only thing significant about a person's identity is his awareness of his self and of past. It is the awareness of past that causes some logical difficulties, however. If my identity is defined on continuous recollection of my past, how do we factor in sleep? Are there holes in my existence from every time I have lost consciousness? Some say that sleep is not unconsciousness, and some even go so far as to say that any mental inactivity that truly counts as unconsciousness cannot be awakened from, because it implies total lack of self. Whether or not that is true, however, many memory theorists would be willing to say that there are gaps in a person's identity, because although such an allowance may seem odd to anyone who does not yet fully embrace Locke's PI distinction, it does not, in fact, have any logical flaws. Identity, if defined by memory, can be and in fact is shaped by a person's consciousness—that is true by its very definition and is almost absurdly repetitive to state.

A trickier problem is that raised by the question of change in memory: if I remember now, at eighteen years of age, what it was like to be ten years old, and if I later, at age forty-two, remember what it was like to be eighteen but do not remember what it was like to be ten, that means that the 42-year-old me and the 18-year-old me are the same person, and the 18-year-old me and the 10-year-old me are the same person, but the 42-year-old me and the the 10-year-old me are separate individuals. In other words, x=y, y=z, and x≠z, a logical impossibility. Logical impossibilities aside, one must question any position that implies that something that happened to someone and was forgotten therefore did not happen at all. A response to this is that Locke's PI requires only that every part of a person's past is remembered at some later point, so that continuity need not flow smoothly as long as it does progress. The fact that the 42-year-old me remembers the 18-year-old me means that the memories of the 18-year-old me hold significance to the 42-year-old me's identity and continuity. In addition, if I at 42 remember that I at 18 remembered what it was like to be 10, that implies a continuity of consciousness, regardless of actual immediate recall capabilities. If such allowances are not made, you are not the same human being that existed under your name ten years after your birth (or what you believe to be your birth, we must now say). What, then, must we conclude if someone has false memories? It is an indisputable fact that people's recollections of past events are sometimes inaccurate: large groups of people who witness the same event almost invariably produce differing accounts of what occurred—often radically different accounts. If I become convinced that I was abducted by aliens as a child, does that mean that alien abduction is now a part of my identity and my past, even though it never occurred? And if I am instead rather smugly convinced that it did not occur (as is true*) when it in fact did, does that mean that it is not a part of me and my history? The simple response is that I may have a flawed sense of my entire self without its affecting my self, the assumption being that the false memories are delusions and that the actual memories exist somewhere in the mind, possibly forever dormant. If I was actually abducted by aliens when I was 10 but that memory was erased from my mind by the government as part of a massive cover-up, a memory theorist might confidently respond that the abduction is not part of my PI, and although it happened to my body and is therefore part of my animal identity, it did not happen to me, and it would be false from a Lockean point of view to say, "I was abducted by aliens." We must keep in mind that what is true for our personal identities is not necessarily true for the rest of the world.

One argument leveled against Locke's PI/animal identity distinction involves the hypothetical situation of a mind-swap. If A's memories go into B's body and B's memories go into As body, can it be said that the A-body is B and that the B-body is A? If you (A) are told that you and your friend (B) will undergo a similar mind-swap, and if you were then told that one of the two bodies would live the rest of its life in a state of total agony while the other lived the rest of its life in a state of total ecstasy, what would you say if you were told in conclusion that you had the choice of which body got the pain and which body got the ecstasy? You would probably choose that the B-body receive the ecstasy, assuming that you yourself would soon be in that body. But what if the situation were phrased to you without the mention of B and the B-body at all, Williams asks. What if you were told that your memories would be taken from you, that you would be given the memories of someone else, and that you would finally be placed into a state of total agony? Total agony, Williams argues, is no better when you are a miserably deluded person who no longer remembers what is going on or why he is in agony. In some ways, says Williams, it is worse. He acknowledges that fear of the future can be altered if it involves a psychological change in relation to a psychological cause, meaning that an arachnophobe might not be terrified to know that he will soon be covered with spiders if he is told that he will love spiders when it happens, but he maintains that psychological changes have no relation to physical causes, meaning that our bodies will feel pain regardless of what we remember and who we think we are and that we should therefore fear future pain no matter what mind-swaps occur. In response to that, we must point out that anyone can fear anything in the future if he believes it will be happening to him, and such a fear does not prove that it is happening to him. Williams' point therefore does not necessarily affect PI and does not in any way eliminate the possibility that identity can in fact make a total switch of bodies.

Imagine, then, for a moment, that there exists a machine that is capable of recording the relative locations of every single molecule in your body, along with all the energy, electric charges, and neural impulses therein. Imagine that this machine sends this information to another machine, and that the latter machine uses the information to pull random molecules from the air and create a new body, physically identical to the original, with a mental state identical to yours at the moment at which the first machine was activated. Imagine that, at the instant that the new you is created, the old one is reduced to random molecules—the opposite of the other process—so that you are effectively transported across an unspecified distance. Keep in mind that the molecular make-up of the human body is [in?] constant flux: although some parts of the body such as brain cells never die or are remade, the molecules they consist of shift on a regular basis. It is therefore true that anyone who suggests that a new body created by this machine would be inherently separate from a teleporter and his identity is also suggesting, presumably inadvertently, that your body now is inherently separate from your body when you were ten—not different, but inherently separate in terms of identity. I should suggest that such a claim is a logical catastrophe: a person is therefore not a continuous being at all, and no one is the same individual from one instant to the next. If that is true, there can be no such thing as responsibility unless we treat this infinity of identities as one, just as countless still images can become a single moving picture, and if we make that leap, the assertion becomes meaningless, as we have returned to the original assumption that there exists a continuity of identity.

Imagine now that you have the opportunity to use this hypothetical teleportation machine. You can push a button and instantly appear elsewhere. But is that really what will happen? Can the new you be held responsible for all that you have done? Even if it can, does the fact that its memory can extend backwards in time mean that your consciousness will continue forward in time? Will you be teleported, or will you die, only to be replaced by a duplicate somewhere else? The duplicate will of course think it is you and behave like you—will behave exactly as you would, in fact, were you instantly resituated in space to its point of origin—but will it be you? Locke, of course, would say yes, because there exists a continuity of memory and self-awareness. The fear of death that you might feel—the feeling that being reduced to random molecules is not a form of transportation—is based on a limited view of identity, and if you are confronted with the fact that you are saying that your identity is based entirely on your body, you might reconsider your fear.**

But what if the machine malfunctions? What if the new you exists for a good ten seconds before the old you is disintegrated? The new you would then cease to be identical with the original you, because your lives would diverge for ten seconds, changing your respective PIs, and the disintegration of the original you would seem clearly to be your death. Can we argue that the difference of ten seconds also makes the difference of life and death, that if the two yous had not accidentally existed simultaneously, you would not have died but would instead have continued? I, for one, am not confident in that assertion. To quote John Perry's interpretation of Bernard Willimas' nonduplication argument, "A doesn't cease to be the A-body person simply because the B-body person is hanging around." We can rephrase and rethink that slightly to say (keeping in mind that if x=y, then x=y***), "A doesn't cease to be the B-body person simply because the A-body person is hanging around." Locke's PI/animal identity distinction allows for the existence of two beings with the same PI, assuming that their experiences do not diverge, and although you and the new you will diverge in experience from the moment of malfunction, there is no reason why the new you is any less you than the original you. At the moment of its creation, it is you, by Locke's argument, and although it diverges from you in experience, that does not mean that it is no longer you, but means rather that the meaning of the term "you" has changed.
(i) A pushes a button. [A="you"]
(ii) B is created. In the instant of creation, A=B. [A="you"=B]
(iii) A and B diverge. ["you"=???]
Our instinct is to insist that A continues as the sole being with the right to be thought of as "you." If it is not, we must accept that the concept of "you" no longer exists as it once did, a thought which is necessarily discomforting to those of us raised to put stake in our identities, but not in any way unreasonable. The problem is this: we tend not to want to acknowledge Locke's PI when dealing with terms such as "you" and "I." After (ii), the question of whether or not "you" continue depends entirely on how you choose to define "you," and choosing A proves only that you are more prone to accept a version of yourself that was not rebuilt than one that was, which is not an entirely reasonable position, considering the aforementioned flux of our physical make-up.

Regardless of A's identity, however, we have created a situation in which A is to be reduced to random molecules in a matter of seconds, which constitutes death from almost any point of view. Whether we look at it from the standpoint of PI or of animal identity, and whether or not "you" and your PI will continue to live in the hypothetical situation we have crafted, A and the body you now inhabit will die. This brings us back to Williams' point about pain: perhaps pain is something to fear regardless of your identity and your self; perhaps it is a mistake to think that a basic sensitivity to pain and other physical things is affected by PI at all. If anything, Locke's distinction between animal identity and PI supports and is supported by Williams' point about pain: while PI can be divorced from the physical, enabling things like mind-swaps to be a possibility, animal identity cannot escape pain or other physical hardships, and it is that distinction that helps to solve the argument between memory theorists and their critics. If we refer to your animal identity as you and your PI as You, we might suggest further that you, although some might argue that it is not as important as You, is quite significant in an individual life, and from that we might draw that while You might be able to enjoy the manifold benefits a teleportation machine can provide, you must look upon such a machine as no more than a technologically advanced guillotine.

* I think it's funny that I felt I had to include this. Or was this a little joke (on smugly)?
** [This footnote was in the original essay.] Perhaps you fear teleportation because you believe that identity is based neither on your body nor some sort of continuity of memory, but rather a soul in which consciousness is contained. Is there any reason why such a soul could not leap from one body to the next, especially if a new body is created in need of a soul, and that new body is identical to the one of yours that just disappeared? The soul must jump around molecules on a regular basis anyway, as we previously determined, so it must necessarsily possess some level of mobility and willingness to accept physical change.
*** Huh?