Just messing with ye...
Unless of course China opens up an embassy in a US military base in France... But that's another story.
LOL.
I don't think is trying to say anything different than I did. Not only do all three have a claim, more importantly all three have an equally valid claim. They are equally right when they say that they are "you".
Which is the problem. Before you step into the transporter, "you" refers to one person (as we are used to). After teleportation "you" now refers to three people?

Make no mistake, there are three seperate people standing in front of you. Each has his own mind, self-awareness, consciousness, occupies a unique point in space, etc.
I think the answer that makes the most sense is that before there was only one of you, and after there are three of you.
That doesn't make any sense at all. How can there be three of me? By definition, "you" and ""me" picks out a
particular person. If you stood in front of a group of people, looked around vaguely, and said, "I want you to step forward." they would naturally ask, "Which one of us?" You're trying to argue that
before teleportation, we are correct in our usage of "I" (that it picks out one person), but
after teleportation, "I" is synonmous with "we". That is to say that "I" can now
refer to multiple people. You might have a point if the three duplicates somehow shared a group mind and point-of-view and could use the word "we" in some bizzare but understandable context (like the Borg), but that is not the case. The three duplicates are three seperate distinct people, each with their own mind, consciousness, and point of view. When one of them is hungry, he will say "I am hungry". He will not say "we are hungry". Teleportation does not magically change the conventions of language.
It doesn't mean that all three of you are a single person, but rather that a single person was multiplied by three.
Right, which gives you three distinct people: Copy A, B, and C. Personal identity is not some kind of pixie dust that can be spread to each duplicate that steps out of the transporter. The three duplicates, no matter how much you want them to be one person, will go merrily about their lives, each behaving as if they are a unique individual. If duplicate A screws up on a job, do you think his boss is really going to be confused about who to fire? Or that he'll try to fire all three of them, even though the other two don't even work for him? That is where this loopy idea leads.
You seem to get hung up on the word "you", which unfortunately in the English language does not change when it becomes plural, like it does in many other languages including some English dialects.
"You" is simply a singluar pronoun which takes the place of a person's name. Which language are you thinking of that has a plural pronoun which refers to a single person? "Y'all" is short for "you all" which refers to a group of people.
That makes the discussion somewhat misleading. Your example starts with a "you" and results in a "y'all".
Which is not a problem. We start with one person ("you"). That person is destroyed and copied three times. We now have three seperate people ("You all"). What you're trying to do is have "you" refer to one person prior to teleportation, and then have "you" refer to multiple people after teleportation.
All interesting themes for a science fiction story (probably already done to death), but not really valid philosophical arguments. And they are easily answerable: if one of them dies, the others are still alive.
Because they're seperate people with seperate identities. If "you" referred to all three of them, and one of them died "you" would suffer what, 1/3 of a death?
If one of them wins a lottery it all depends on what sort of property law exists in a society where people can get a million copies of themselves; if for the law they are the same person all the copies will have to share. If they are recognised as separate individuals, the one who wins the lottery may keep it all to himself and be rich, while the others are not.
How else would you do it other than recognize them as seperate individuals? Suppose one of the duplicates commits a crime. Do they all go to jail? Of course not. Suppose one gets a speeding ticket. Do they all pay the fine? One owes back taxes. Do they all chip in? One needs a check-up. Do they all go to the doctor? One screws up on the job. Do they all get fired?
If personal identity can apply to more than one person, you're forced to give extremely counter-intuitive responses to these questions: Jail time for every duplicate if one of them commmits a crime; all duplicates must pay a fine if one of them speeds; a cancer diagnosis of one duplicate affects all of them; the firing of one duplicate from his job results in unemployment for all duplicates. Of course we know that if Duplicate A accidentally runs someone over, all the other duplicates will not be charged with manslaughter. That alone should tell you that personal identity cannot apply to more than one person. I'm really surprised we're still arguing this point.
Under materialism, teleportation of personal identity suffers from two fatal problems. At the start of teleportation, a malfunction that makes a copy of a person without destroying the original leaves the person understandably anxious about completing the process and hopping into a nearby incinerator. A malfunction at the far end that results in more than one person being created from the scanned information runs into the personal identity problems illustraed above: personal identity, applied to more than one person, makes no sense and gives extremely counter-intuitive results.