@baumhaeuer:
(Sorry my reply is belated, I've been sleeping all-day after not sleeping the night before last studying for my math final--I think I failed...AGAIN...but at least it's not for lack of trying...)
Anywho:
"Obi's discouse assumes two things: that the body/soul relationship can be likened to the harp/melody relationship, and that the body is the harp and the soul is the melody (why not the other way around?)."
I have two responses to that:
1. The harp/body is something concrete, ie, something physical. By contrast, the harmony/soul is something more abstract, ie, something beyond the mere physical. (In the case of "harmony' this is somewhat dubious as it might be argued that sound waves are technically a physical phenomenon; nevertheless, "harmony" can manifest itself in sheet music as well, and really harmony's an analogy for the soul, so it's not likely to be picture-perfect, just roughly so.) The physical can be destroyed, but the abstract cannot; likewise, a harp can be destroyed, but a harmony cannot, at least not in this sense. Therefore, the harmony seems to exist "beyond" the harp, and so may be said to be analogous to the soul, in the same way the soul is beyond the body. To give a futher example, imagine your memories/self being transfered from one utterly-destroyed body to another, robotic body--we would be inclined to call you, even still, baumhaeuer--or maybe Robo-baumhaeuer--because what maeks you YOU, ie, your memories and personality and so on, is still intact, it's jsut in a different carrying case.)
2. Harmony gives meaning to the harp--ie, gives it a function and a purpose and defines it as "the harp playing Harmony A as opposed to the harp playing Harmony B"--and this relationship does not work backwards. The harp is merely an instrument. It does not create the harmony, I would argue, but rather only facilitates its playing, the MUSICIAN creates the actual harmony. He does this by either writing the notes for said harmony, playing those notes, or both. In the first case, we do not need the harp for the musician to write the notes that compose the harmony, and so the harmony CAN exist independently of the harp itself, and we can further imagine taht harmony being played on multiple harps, not just one harp palying one harmony and only that harmony for all eternity. As such, the harp, again, is only an instrument. By contrast, the harmony gives the harp meaning. Without any harmonies or songs or notes to be played, the harp is utterly useless. The same applies to the body/soul arrangement. The memories and experiences and ideas of the self, to return to the Robo-baumhaeuer example again, all that make you you, and without those, we might consider your body to be void of any cognitive action and just a useless shell of flesh and bone, with the "real" baumhaeuer having already been lifted into another body. As the harmony and abstract self/soul can give meaning, and the harp/body can only facilitate that meaning and act in accordance with it, and not on their own accord--ie, a harp cannot decide to play "its own" composition--cannot. Therefore, the soul and harmony are superior to the body and harp.
The rest of your change/no-change examples seem to relate to Hume's Bundle Theory (that is, Hume's idea that features of objects are all that exist, and so those may change and come and go at will, because udnerneath all the features and properties that we woud say made Ronald Reagan who he was, strip him of those features one by one and eventually, even taking away the molecular structure of the man, you are left with no "Reagan" underneath) and so I'll adress it as such.
If we accept that change=new object is an all-or-nothing affair, then we must admit to Hume's idea of Bundle Theory, that "we" are just changing all the time, and one the last meolecules leave us, there is nothing underneath all those changes.
For another example, more to the point made here particularly, Locke's Soul Dilemma:
Imagine that you DO, for the sake of argument, have a soul.
It completely defines who you are.
Now, every night, "God" takes this soul away.
Into your body, he places a soul that is absolutely identical to the old one.
However, it is NOT the old one.
You wake up and, because your new soul is the same as the old, no one can tell.
Did YOU die when God gave that new, identical soul to your body?
If your soul is your very self, and that was taken away, even if it was replaced by a perfect clone, it doesn't seem as if we can call that clone "baumhaeuer" so much as "baumhaeuer 2.0."
Apply that to physical change of the body.
If one atom of my right index finger's leaving my body and being replaced constitutes my no longer being the same as before, if we're going to be all-or-nothing, then "obiwanobiwan" stopped existing about two lines ago.
(Somewhere, mapleleaf weeps with joy.) ;)
But most of us would find thsi to be absurd, because really, one atom doesn't make up the WHOLE of a person...it's such a minority of a person that it doesn't seem to factor in, and since it can be replaced with no change to the ORIGINAL structure--not to a different strucutre a la Locke's Soul Dilemma--it seems innocuous, and I still exist.
(Sorry, maple.)
But your idea of a little-person/Big-Person framework is intriguing, so let's try that.
But before we can, I think we have to make another distinction, namely, between the Cognitive and Corporeal persons.
The Cognitive "person" is that which contains one's memories, experiences, thoughts, ideas, etc.
The Corporeal "person" is the physical matter that makes that all possible.
Now, in keeping with Hobbes and Hitchens and Hume--why do all the great Materialist philosophers have surnames beginning with "H"--a smart atheistic or agnostic person at this point might very well ask,
"Well, your ideas and thoughts and experiences and so on are all caused and stored and are the product of electro-chemical responses in the brain and nervous system, so aren't these also materialist areas?"
The are, indeed, caused by those responses, but this is just like the harp player causing the notes of a harmony to occur--the harp player is a physical cause, but the harmony ITSELF is beyond that cause, that is, we can seperate it from the intial cause (ie, the hapr player can die, but the harmony can live on and be played by another.) What's more, the actual "harmony" is soemthing abstract in nature, just like what my personal idea of "freedom" is; now, the harmony is caused by something physical, and I take my idea of "freedom" from the physical world, and sheet music stores the harmony, and parts of my physical brain store my ideas, but even still, causing and storing are different in kind from actually BEING my ideas.
So.
Little/Big person/Person, and Cognitive/Corporeal.
And now, let us observe before us The Life of Brian. ("He's not the messiah, he's a very naught boy!" There--we've all got it out of our system now?)
Brian is born January 1st, 2011.
So, Moment 1--or M1--we have:
1/1/2011, M1:
Brian is born.
2011, M1 brian is born.
2011, M1 Cognitive Brian exists.
2011, M1 Corporeal Brian exists.
A few minutes after birth, of course, the umbilical chord is cut...M2...
Brian exists.
2011 M1 brian dies.
2011 M2 brian is born.
2011 M1 Cognitive brian exists.
2011 M1 Corporeal brian dies.
2011 M2 Corporeal brian is born.
Now we press on a few years.
We may assume that for every few seconds, a Corporeal brian is killed and another born via the basic ohysical changes that go on within and outside of the human body.
Now, the 2013 brian is the same as the 201 brian, as while there have been small molecular changes every few seconds, no big, life-changing physical additions or subtractions have yet occured, so we can junk the idea of 2013 brian and stay with 2011 brian, since it's basically the same thing, and so 2011 brian has not died, though 2011 M1 Corporeal brian died a few seconds after the umbilical chord was cut.
Needless to day, Brian still exists, for if not Brian existed, no brian could exist, either.
Cognitive brian is still intact, as while his learning things at this time, such as what blue is and that applesauce is for eating, not flinging at others, none of this disrupts the essence that is, at this moment, Cognitive brian.
But this cannot be the case for long.
So let us flash ahead a few years, and Brian is now 5.
We are now at Moment 300,005/ M 300,005
To recap, before our event:
Brian exists.
2011-16 brian exists (though for simplicity's sake, all those models are mostly alike)
2011-16 M-300,004 Corporeal brians are dead
2016 M-300,005 is born
2011-16 brians are alive, though all are relatively similar.
Brian is now in a car accident, and loses his left arm as a result.
What's worse, Brian's father dies in the accident.
Brian exists.
2011-16 brians are now dead.
2016 M-300,005 brian is born, as losing an arm is a major, unchangeable alteration.
2016 M-300,004 Corporeal brian is dead.