"There are many different senses of the word "person", so it is impossible to answer such a question without qualifying it."
Wow, this is swell. So all your talk about brain waves and the like were utterly irrelevant. Why did you waste our time?
"Hence, it only compounds the tragedy to have people who have no stake in the pregnancy barging in with their opinions and prescriptions."
Nonsense. We're talking about a procedure that is literally available up until the due date. We aren't talking about the 'glob' in the second trimester.
"I'm not dodging that in the slightest."
You are totally dodging.
"Such terminations are almost always under extraordinary circumstances, and I don't think that the moral choices are as cut and dried as the anti-abortion ideologues would have us believe."
First of all, I doubt very much that they are 'almost always under extraordinary circumstances.' Feel free to provide some data. Second of all, we are talking about a third trimester baby that by your own definition- up until the last post, anyway- qualified as a person. If it is not 'cut and dried' that persons deserve our protection, then there is nothing else to talk about.
"I have not acknowledged that such a fetus is a "person", because we have not agreed on what "person" means in this context. I will certainly acknowledge that a late-term fetus is closer to personhood than a zygote or an embryo, but not as close as many mature animals."
Amazing.
Why should we have to agree on what 'person' means in this context? All I am asking you is to use your own definition.
My definition is irrelevant.
For example, do you know who said:
I think that a fetus that can survive independently of the womb without extraordinary measures is entitled to civil protections.
?
Do you think that a 'fetus' that is due on Wednesday can survive independently of the womb Tuesday without extraordinary measures?
Or who said: "Embryos are not capable of thought in the same way that a comatose patient is."
Surely we are not talking about embryos anymore?
Do you wonder who said: "It is about what the role of government should be in regulating the lives of individuals. In the case of pregnancies, society has to decide when a new individual comes into existence from its perspective. In our society, that happens to be the end of the second trimester of a pregnancy."
It is silly to demand that
we agree on personhood. It is only important that you agree with
yourself on personhood status.
"I have not endorsed any such action or behavior, but I am not surprised that you impute it to me."
I haven't imputed it to you. As I said to start with, I wasn't aware that you believed late term abortions were what was meant by 'right to choose.' As seen from the above quotes (I wonder who said them) I had every reason to believe that you rejected late term abortion because the 'entity' could survive independently and otherwise qualified as a person (it has a brain that works up to your standards, etc).
So, it is a very simple question: do you believe that a baby due by wednesday is a person on Tuesday?
If this question is too difficult for you, perhaps above your pay grade, maybe you need to leave such important matters to the rest of us.
"I agree, but the problem is that there are always those gray areas in life,"
This isn't a gray area on your own previously stated terms.
"You were faced with such a choice, and I think that you made the right decision."
I'm really not talking about me here.
We are talking about the coherency of your own position. As you well know, I never considered your position very coherent to begin with, at least as it corresponded with reality.

However, I recognized that in some sense it was internally consistent.
Consider the following: The 'baby' is due on Wednesday. Is it a person on Tuesday based on your own definitions? If not, if it is still ambiguous and gray and a hard moral choice, what about on Thursday after it is born? What 'scientifically' changes in the course of a scant three days so that what is done on Tuesday is legal and permissible and 'none of our business' but on Thursday you'd call murder?
"But it is her responsibility to make it, not the government's."
By your own arguments previous to this point, the question of 'personhood' is determined not by the woman or the government but by 'society.' And by your own statement, this "happens to be the end of the second trimester of a pregnancy."
"Again, I think that it depends on a case by case basis."
This seems like a red herring to me. It'd be like saying it was ok to execute slaves because, well, its only done rarely- but it's ok, because, well, society doesn't really think they are persons. But if you'd like to provide data that shows that late term abortions are not predominantly elective, feel free. Otherwise, 'I think' isn't going to cut it when it seems the principle itself is already specious.
"Nor is it unjustifiable simply because it is abhorrent. Sometimes, people must choose between two evils."
Like... torture?
"But it is unlikely that my source materials would be the same as yours."
My sources are Tiller himself. The man wasn't exactly shy about what he believed.
"Once you start to condone cold-blooded murder, you lose your right to proclaim your reverence for the sanctity of life."
But it seems that you are prepared to condone cold-blooded murder right now. I'm sitting here thinking that you are at risk of losing YOUR right to proclaim your reverence for 'personhood.'