Organic statue - human being?

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Let’s consider a thought experiment. Suppose that biochemists, and associated other scientists figure out a way to build or grow a biological “statue”, which looks like a human being. It is all composed of organic material, it has a DNA which falls into the category of “human DNA”. It has a brain, too, but it does not function, there is no chemical-electical activity. (As such, none of the other organs “work” either.) I think we can all agree that it is truly just a statue, nothing more.
I disagree. How will it be grown or assemble for that matter? The only known way to grow a human body is by using fertilized eggs. The instructions encoded in the chromosomes of a fertilized egg is the only thing that can make it develope. How can you grow a body without it resulting in a human being? I think you are making a false dichotomy between the body and the soul, as if you could make a body without a soul dwelling in it and then revive it.
 
I disagree. How will it be grown or assemble for that matter? The only known way to grow a human body is by using fertilized eggs.
You need to think outside the “box”, and look beyond what is “known today”. This is a thought experiment, where we are not bound by the technology which exists today. For example we can imagine a perfect copy-machine, which copies anything om the atomic or sub-atomic level. We could make a perfect clone of someone. Now comes the question: does the copy have a soul? If someone asserts that it has a soul, then the next question is “where did it come from”? Did the material copy machine also copy the soul? Makes no sense, a material copy cannot also make a copy of an immaterial soul. Did God imbue the copy with a soul? If so, when? When the first atom is copied? When the last atom is copied? Somewhere in-between? All sorts of interesting questions.
The instructions encoded in the chromosomes of a fertilized egg is the only thing that can make it develope. How can you grow a body without it resulting in a human being? I think you are making a false dichotomy between the body and the soul, as if you could make a body without a soul dwelling in it and then revive it.
The whole point of the experiment is to show that the concept of the “soul” is superfluous and unnecessary. No one can demonstrate the existence of a “soul”, moreover I have never even seen a coherent definition of it.
 
Let me see if I understand you: do you mean that the “soul” is the ideal functionality? Which would be exhibited if there were no physical impediments? I am not sure what you mean.
No, the soul would provide the ideal functionality. Please do not confuse the cause with the effect.
I wonder if you mean by the word “species” the biological classification. If so, then I must point out that this classification if arbitrary and merely descriptive. Dogs are merely domesticated wolves and jackals, and sometimes they even interbreed. Is there now a dog-soul and wolf-soul? I simply do not understand your proposition.
Yes, this is very true. And what you show here that these classifications are not really useful. We need to look at the functionality, or behavior, and based upon that we see if that other being exhibits signs of sentience. If it does, it should be considered to be an “honorary human”. It does not matter if its a carbon-based life-form or not. It does not matter if it was born here on Earth or not.
Sorry, but that sounds like a circular definition or tautology to me. I think, my basic problem is that I do not comprehend what the word “soul” is supposed to mean.
I must confess that I am still working through this philosophy myself, and I thank you for your responses; they do help me. I will concede your critiques of my theory within the domain of science, and I must agree that there is no objective, repeatable method to detect a soul. However, I will contend that your method is not objective either. I speak not of the data, but the application of that data.

To assert the theory of humanity-by-functionality, we must first compile a list of “human” functions. Since it is not actually my intention to enact this theory, a partial list will do. Let us propose, drawing from your previous posts, that language, emotion, and IQ are three members of this list (although we may consider that the list might contain ten criteria or more!).

There are may ways that each of these criteria can go wrong. Language can be impaired in many different and amazing ways. Comprehension, inability to form meaningful sentences, inability to form fluent sentences, and many different combinations of these form a long list of ways language can go wrong. However, the loss of the language ability is not enough to lose human status, is it? Nor would the gaining only of language be sufficient to gain human status, eh?

In another vein, some people do not experience emotion. If they commit a crime, we cal them sociopaths, but the label is equally appropriate for the untold number that do not commit crimes. Certainly even these beings are humans.

Finally, we have treated IQ in a previous post by acknowledging that a low IQ even of 50 is not enough to strip a being of human status.

In summary, the display of all the traits of humanity is not necessary for personhood to be acknowledged. However, how do we choose which traits are necessary? Will different combinations from a pool be acceptable? To what degree must each trait be present? Your method appears on the surface to be scientific, but it is fraught with politics.

In defence of the soul (in the philosophical domain, mind you, not the scientific), we know that the absence of a trait of humanity in a particular specimen does not negate the being’s personhood, precisely because we know that the trait is in fact present in the soul, only physically impaired.
 
No, the soul would provide the ideal functionality. Please do not confuse the cause with the effect.
Thanks. That is why I asked, because I did not understand. We can return to it later, to flesh out just what the soul is and how does it provide the functionality. But let’s see the rest of yout post first.
I must confess that I am still working through this philosophy myself, and I thank you for your responses; they do help me. I will concede your critiques of my theory within the domain of science, and I must agree that there is no objective, repeatable method to detect a soul.
Ok. If I can be of assistence, I will be happy to provide.
However, I will contend that your method is not objective either. I speak not of the data, but the application of that data.
I think it is objective, so I will give reasons why I think so. But I admit that so far I left it vague, intentionally so. So let’s get down to the details.
To assert the theory of humanity-by-functionality, we must first compile a list of “human” functions. Since it is not actually my intention to enact this theory, a partial list will do. Let us propose, drawing from your previous posts, that language, emotion, and IQ are three members of this list (although we may consider that the list might contain ten criteria or more!).
My list is somewhat different and very short. 1) It is ability to conceptualize. Nothing more. Also there is an auxiliary ability which is useful, but not essential: 2) the ability to communicate. The ability to conceptualize, to form abstractions is the hallmark of a sentient being. The lack of ability to communicate does not impair the status, but it makes others unable to recognize the fact.

Suppose for a second that “rocks”, “stones” and “pebbles” are living and senient beings. They are able to form abstractions, they communicate with each other. Unfortunately (for us) their lifespan is about 70 million years. What is a lifetime for us, is just one second for them. As such there is no communication between the rocks and us. We cannot detect if they are sentient beings, or not. Examples like this should be a warning: it is possible that no matter how precise and accurate the definition of a sentient being is, it is possible that we shall be unable to recognize this fact.
In defence of the soul (in the philosophical domain, mind you, not the scientific), we know that the absence of a trait of humanity in a particular specimen does not negate the being’s personhood, precisely because we know that the trait is in fact present in the soul, only physically impaired.
I think we need a proper definition of the soul. To say that it “provides” the perfect functionality only describes what the soul (allegedly) does, but does not tell us, what the soul actually is.
 
I think we need a proper definition of the soul. To say that it “provides” the perfect functionality only describes what the soul (allegedly) does, but does not tell us, what the soul actually is.
The Greeks invented the philosophical concept of soul. So we have to go back and reactivate the meaning. For Aristotle, the soul is not a being, a freestanding independent substance. Only a concrete being, like “this rock” or “this human being”, is a substance. The soul is the “form”, the structure, the organization of parts, that is the basis for abilities, for actual functioning - in Aristotelian terms, the soul provides the “potentiality” for the “actuality”. This distinction between potentiality and actuality is one of the great philosophical achievements.

An example: rocks cannot converse about the weather because they do not have the potentiality. Humans, in contrast, have this potentiality.

“Soul” is not a superfluous concept. It provokes us to think about those abilities which are “essential” to types of being, e.g., the nutritive, the self-moving, the rational.

And we need to do this. How many of us can give a good definition of, e.g., rational?
You might equate “rational” with “language use”. But what is “language”? This is not an easy question. Well, you might say “syntax” and “semantics”. But what’s implicitly assumed here? That we can talk about “how it is” with beings. Now, it’s becoming a little more mysterious.

And it becomes especially interesting when we try to distinguish the"language" of bees, monkeys, dolphins, etc from “human” language.

And this where the study of the great philosophers like Aristotle can come in handy.
 
The Greeks invented the philosophical concept of soul. So we have to go back and reactivate the meaning. For Aristotle, the soul is not a being, a freestanding independent substance. Only a concrete being, like “this rock” or “this human being”, is a substance. The soul is the “form”, the structure, the organization of parts, that is the basis for abilities, for actual functioning - in Aristotelian terms, the soul provides the “potentiality” for the “actuality”. This distinction between potentiality and actuality is one of the great philosophical achievements.
I see no reason to ponder the speculations of ancient people, even if they were geniuses like Aristotole was. Using words like “form” does not add to the understanding. Also the concept of “potential existence” is an oxymoron. Something either exists actually, or does not exist at all. In the latter case we can speculate about “how would this thing be, if it actually existed”. That would lead to “concepts”. If something does not exist, it cannot have attributes. Existence cannot be treated as an attribute (like Anselm did with his “greatest conceivable being” as an attempt to prove God’s existence). It is nonsensical to say: “there is a nonexistent red ball on my imaginary desk, placed on an expensive book which has not been written yet”. Or to say: “I have yellow pencil in my hand, and, oh, by the way it actually exists”. The first proposition is meaningless, the second one is redundant.
An example: rocks cannot converse about the weather because they do not have the potentiality.
How would you know that? The lifespan of a rock is 70 million years, so for the rock one second of its life equals our whole lifespan. We cannot even discover if the rock is alive or not, much less conduct a conversation with it.
“Soul” is not a superfluous concept. It provokes us to think about those abilities which are “essential” to types of being, e.g., the nutritive, the self-moving, the rational.
But there is no such thing as “essential” in a vacuum. “Essential” only exists in a context. What is the “essence” of a rubber ball? For the child the essence is that it can be used to play with it. For the manufacturer it is that it can be sold for money.
 
My list is somewhat different and very short. 1) It is ability to conceptualize. Nothing more. Also there is an auxiliary ability which is useful, but not essential: 2) the ability to communicate. The ability to conceptualize, to form abstractions is the hallmark of a sentient being. The lack of ability to communicate does not impair the status, but it makes others unable to recognize the fact.
I think I will like this. What does “conceptualize” mean? How may we determine a being’s ability to conceptualize once communication is established?
Suppose for a second that “rocks” are living and senient beings. They are able to form abstractions, they communicate with each other. Unfortunately…there is no communication between the rocks and us. We cannot detect if they are sentient beings, or not. Examples like this should be a warning: it is possible that no matter how precise and accurate the definition of a sentient being is, it is possible that we shall be unable to recognize this fact.
Quoted for interest 🙂
 
I think I will like this. What does “conceptualize” mean? How may we determine a being’s ability to conceptualize once communication is established?
Conceptualize: create abstractions or mental equivalents, or concepts. How do we detect it? By using the Turing test. If there is a communication channel, we can conduct information exchange and come to a conclusion about each other. In the information channel we “throw” propositions to each other (conversation). From the answers we can deduce if the other party understood our propositions. Fortunately information can be measured, so we do not have to resort to mere speculation to find out if there is an understanding between the two parties.
Quoted for interest 🙂
I am glad you like it. Too bad I cannot claim ownership. I borrowed the example from the “Andromeda Strain” by Michael Crichton.
 
Conceptualize: create abstractions or mental equivalents, or concepts. How do we detect it? By using the Turing test. If there is a communication channel, we can conduct information exchange and come to a conclusion about each other. In the information channel we “throw” propositions to each other (conversation). From the answers we can deduce if the other party understood our propositions. Fortunately information can be measured, so we do not have to resort to mere speculation to find out if there is an understanding between the two parties.
Information cannot be measured. What units could it possibly be quantified in? The intercourse of information does not lend itself to a deduction, rather an inference. Are not we, as adults, accustomed to speaking to beings of lesser mental stature than ourselves. When I tell my dog to sit, he sits. He hasn’t mastered ‘stay’ yet. When I ask my niece if she would like a sticker, she takes one. She does not respond to broccoli however. When I talk to another university graduate about linguistics, he tells me to stop talking gibberish; his field was engineering. Please help me; it again seems like there are so many ways to muck up this investigation.
 
Information cannot be measured. What units could it possibly be quantified in?
Of course it can. That what information theory is all about (not to be confused with information technology). The measuring unit is, of course, bits. Try this experiment: take a newspaper, and place a piece of paper horizontally on it, so only the upper half of the printed line is visible. You will have absolutely no difficulty in deciphering the whole line. There is so much extra information (redundancy) built into the language, that you can deduce the hidden part. Another example: when you use the phone, there is always some noise on the line, sometimes making the comprehension diffcult. For you, the talk is the information, the noise is just that: noise. For the techincian, who investigates the quality of the transmission, it is the noise which is the information, and the talk (if overheard) is the noise. This example is supposed to show that information is not “absolute”, it is always relative.
The intercourse of information does not lend itself to a deduction, rather an inference. Are not we, as adults, accustomed to speaking to beings of lesser mental stature than ourselves. When I tell my dog to sit, he sits. He hasn’t mastered ‘stay’ yet.
Obviously. You can infer (deduct) that the dog’s comprehension is less than yours.
When I ask my niece if she would like a sticker, she takes one. She does not respond to broccoli however.
And from that fact you can make further inferences about her preferences.
When I talk to another university graduate about linguistics, he tells me to stop talking gibberish; his field was engineering.
And by that you gain even more information about your partner. If I would switch over to a different language (one you probably do not speak), you could rightfully complain that I am not supposed to switch the communication channel midstream. Don’t forget, the communication channel is supposed to convey information from me to you and from you to me. That is sometimes a major problem in mutual understanding. For example, if you would use the word “spiritual” I would have no idea what the word means. I heard the word, obviously, but it is meaningless for me. (Let’s not get into a conversation about it. It was just an example).
Please help me; it again seems like there are so many ways to muck up this investigation.
You are right. The process is long. That is why the Turing test leaves it intentionally vague: it talks about a sufficiently long conversation. Only you can decide what is “sufficiently” long for you. You need to hit as many topics as you can. You can and should employ tricks, place traps to see if your partner simply “parrots” something, of if he really understands your propositions. You can ask the same question with different wording after a time, and see how the other person replies. If he says: “hey, you just asked that 5 minutes ago” you made a serious headway into establishing that he understands what you say. If and when we shall have a computer which is sufficiently advanced to pass the Turing test, then the fun will really begin. I don’t think I will live that long, unfortunately. Of course, about 20 years ago I did not think that I will see a computer beat the world chess champion either, and was wrong. I hope I am wrong again. Time will tell.
 
Of course it can. That what information theory is all about (not to be confused with information technology). The measuring unit is, of course, bits. Try this experiment: take a newspaper, and place a piece of paper horizontally on it, so only the upper half of the printed line is visible. You will have absolutely no difficulty in deciphering the whole line. There is so much extra information (redundancy) built into the language, that you can deduce the hidden part. Another example: when you use the phone, there is always some noise on the line, sometimes making the comprehension diffcult. For you, the talk is the information, the noise is just that: noise. For the techincian, who investigates the quality of the transmission, it is the noise which is the information, and the talk (if overheard) is the noise. This example is supposed to show that information is not “absolute”, it is always relative.
The problem with using bits as the measuring unit is that bits quantify everything typed into a computer, not just the meaningful stuff. It still requires the human brain to do the sorting. And since information is not absolute, rather always relative, it is not objective.
Obviously. You can infer (deduct) that the dog’s comprehension is less than yours.
And from that fact you can make further inferences about her preferences.
Certainly, but that does not help me decide whether either of them are human.
And by that you gain even more information about your partner. If I would switch over to a different language (one you probably do not speak), you could rightfully complain that I am not supposed to switch the communication channel midstream. Don’t forget, the communication channel is supposed to convey information from me to you and from you to me. That is sometimes a major problem in mutual understanding. For example, if you would use the word “spiritual” I would have no idea what the word means. I heard the word, obviously, but it is meaningless for me. (Let’s not get into a conversation about it. It was just an example).
And by engaging in these unhelpful behaviours, any of us could maliciously deprive another of human status.
You are right. The process is long. That is why the Turing test leaves it intentionally vague: it talks about a sufficiently long conversation. Only you can decide what is “sufficiently” long for you. You need to hit as many topics as you can. You can and should employ tricks, place traps to see if your partner simply “parrots” something, of if he really understands your propositions. You can ask the same question with different wording after a time, and see how the other person replies. If he says: “hey, you just asked that 5 minutes ago” you made a serious headway into establishing that he understands what you say. If and when we shall have a computer which is sufficiently advanced to pass the Turing test, then the fun will really begin.
Again, if I decide what is a sufficiently long conversation, then I, and only I, decide who and what is human to me. This process is far from objective and repeatable.
 
The problem with using bits as the measuring unit is that bits quantify everything typed into a computer, not just the meaningful stuff. It still requires the human brain to do the sorting. And since information is not absolute, rather always relative, it is not objective.
Let’s make sure that we use the same vocabulary. “Absolute” and “relative” are not the same as “objective” and “subjective”. There is no such thing as “absolute” meaning, but there is “objective” meaning. That is what I tried to explain. If I have a proposition in mind, put it into the communication channel, you receive it, and if your understanding it is very similar to what I intended, then we have a successful communication and the proposition gained “meaning”.

Let’s say that I am a space alien and in my language I say “good morning” to you. It just so happens that it sounds like “you are in idiot” - by some strange coincidence. Obviously we have no mutual understanding. What is the “meaning” of “good morning” in this scenario? It has no meaning. A meaning is mutually agreed upon by the sender and the receiver in the communication channel.
Certainly, but that does not help me decide whether either of them are human.
It does give you a “hint”, so to speak. That is why your Turing test is not sufficiently long.
And by engaging in these unhelpful behaviours, any of us could maliciously deprive another of human status.
Yes, it could happen. But I am assuming an open mind, and a willingness to arrive at the correct solution. I would suggest that in the case of ambiguity, let’s err on the side of including someone who might not merit including, rather than excluding someone who should be included. You know: I would prefer to let a 1000 guilty ones to go free, rather then to convict one innocent. I know that not everyone agrees with me.
Again, if I decide what is a sufficiently long conversation, then I, and only I, decide who and what is human to me. This process is far from objective and repeatable.
Yes, it is objective. And it is repeatable by both you and others. If you wish to close the “test” prematurely, that is your business. Unfortunately it would be unreasonable to assume that all of us want to arrive at an objective result. Sadly, many people would want to have their preconceived ideas seem to be corroborated, rather then to let the chips fall where they may. But that is not the problem of the method, it is the problem of the ones who conduct the experiment. 🙂

In these hypothetical scenarios we assume that the person conducting the experiment genuinely wants to arrive at the correct result. The experimenter wishes to minimize both the “type one” and the “type two” errors. (You know: the 'type one" error is to declare someone as “sentient” even though it is not, and “type two” error is to declare someone non-sentient, even though it is.)
 
… the concept of “potential existence” is an oxymoron.
You may have misunderstood Aristotle.

Potentiality is akin to an ability which exists even when it’s not being actually exercised. The violinist is not always playing the violin.

According to Aristotle, there are uniquely human “abilities”. And these “abilities” are there even when they are not being “actualized”.

The question, of course, is how to define such human “abilities”.

Aristotle summed it up with the word "rational’. And this began another discussion.

These are all philosophical questions. Their “methodology” does not involve weighing, testing, formulating mathematical laws, etc.

Your thought experiments, for example, are not laboratory experiments. They are “philosophical” attempts to clarify meanings.

And that’s why it’s important to study the great philosophical texts. They may have something to say to us about meanings.

So, Spock, let me ask you a question. Do you know what Aristotle meant by the word “rational”?
 
Aristotle summed it up with the word "rational’ …

… So, Spock, let me ask you a question. Do you know what Aristotle meant by the word “rational”?
Of course, Aristotle did not use the English word “rational” but a maybe not so equilavent Greek phrase which revolves around the Greek word “logos”. So the real question is: what does “logos” mean?
 
You may have misunderstood Aristotle.

Potentiality is akin to an ability which exists even when it’s not being actually exercised. The violinist is not always playing the violin.

According to Aristotle, there are uniquely human “abilities”. And these “abilities” are there even when they are not being “actualized”.
This is perfectly fine. Now why should anyone invent a “mystical sounding soul” to describe these normal, physical abilities? Taking the violin player as the example, that player has certain muscle control, a very accurate pitch (recognizing sounds), etc… These abilities are all grounded in our physical structure, the brain and the body. The activity of body is our motion, breathing, circulation of blood, distributing the nutrients, etc… The activity of the brain produces the mind, our thoughts, concepts, ideas, and so on. (Contrary to what Aristotlele belived that the brain is just a cooling organ for blood).
Aristotle summed it up with the word "rational’.
Sure. He only knew one species of animals which was able to conceptualize, create abstractions, or in other words: sentience. As such he speculated that sentience equals humanness. No argument from me. He was perfectly justified to hold this theory, due to the general lack of science of his time.
Your thought experiments, for example, are not laboratory experiments. They are “philosophical” attempts to clarify meanings.
As I said to Spirithound, “meanings” are not absolute, they get “established” between two (or more) partners who use a communication channel. When I use the word “integral” speaking to another mathematician, it carries a totally different meaning than speaking about an “integral part” of a machine.

This is all cool. What I still don’t see what is the use of creating a new word to describe what a human being can do, when the word “ability” is already there. Either the “soul” is precisely the same as “ability”, or it is not. If they are the same, then the “soul” is redundant and superfluous. If it is not, then it is still undefined. 🙂

Mind you, I agree that Aristotlele was an incredible genius of his time. But due to the lack of advanced science, he had to resort to speculations.
 
This is perfectly fine. Now why should anyone invent a “mystical sounding soul” to describe these normal, physical abilities?
You may need to step back a little on this concept of soul.

I’m no expert here, but to give a few examples: In the OT the Hebrew nephesh, translated as soul, is life breathed into us, the animating principle in us and other animals that separates us from dust. The Taoist chi is perhaps a similar idea of life force. Others even believe the force can be seen as an aura (perhaps halos in old paintings indicate this). Another tradition sees the soul as immaterial and separate from the body, another as a sliver of divinity, another as spiritual light. And so on.

Every culture and religion develops its own ideas. It seems the one certainty is we all have a basic need to put our finger on who we are. Like love, this need is irrational, ultimately it’s not something we can put into words let alone define scientifically. Some speculate that it’s all down to theory of mind – we can only recognize others through our own mind, and since every mind is unique we can never quite agree.

So while what you’re attempting is worthwhile, this is a warning that however you define what it is to be human, like everyone else in history ultimately it may only convince you. 😃
 
You may need to step back a little on this concept of soul.

I’m no expert here, but to give a few examples: In the OT the Hebrew nephesh, translated as soul, is life breathed into us, the animating principle in us and other animals that separates us from dust. The Taoist chi is perhaps a similar idea of life force. Others even believe the force can be seen as an aura (perhaps halos in old paintings indicate this). Another tradition sees the soul as immaterial and separate from the body, another as a sliver of divinity, another as spiritual light. And so on.
No doubt they all speculated and came to some conclusions. Of course they also speculated that lightning is the “flaming sword of God”, that diseases were caused by demonic possessions. that the semen is really a miniature “homunculus”, that there are 4 elements (air, water, earth and fire)… the list of speculations is endless. Of course those people should not be blamed for that. They tried to make sense of the world, and since there were no sciences back then, these speculations were the best they could do.

The good news is that all these speculations were rendered irrelevant and downright false as the scientific methods developed and evolved. The bad news is that many people do not want to accept that these ideas are now obsolete. I am constantly amazed that those ancient people are held in such a high regard, when I read their simplistic speculations. Biologists discarded the idea “animating principle”. Physicists discarded the “flaming sword of God”. Doctors are aware of microbes, and are not concerned about “demons”. Napoleon asked Laplace about his book describing the celestial movements of planets, and quesioned why does he never mention God, he replied: “Sire, I have no need for that hypothesis”. So far the answers concerning the concepts of the “soul” are all different. Seems like there is no concensus pertaining to this concept.
So while what you’re attempting is worthwhile, this is a warning that however you define what it is to be human, like everyone else in history ultimately it may only convince you. 😃
That would be very sad and disappointing. But I am optimistic and hope for a better result.
 
So far the answers concerning the concepts of the “soul” are all different. Seems like there is no concensus pertaining to this concept.
That’s the issue – the concept appears to be based in our raw feelings about ourselves as animals. We can’t put these feelings into words any better than a dog or golden eagle might, and by trying we end up with all these different rationalizations.

So “soul” or “what it is be human” is subjective, collective subjective if you like, but frustratingly unscientific. That’s my hypothesis anyway, I can’t see another reason why there’s no immediate consensus. If I’m right it means that however we try to formally define what it is to be a member of humanity there will always be exception scenarios.
 
That’s the issue – the concept appears to be based in our raw feelings about ourselves as animals. We can’t put these feelings into words any better than a dog or golden eagle might, and by trying we end up with all these different rationalizations.

So “soul” or “what it is be human” is subjective, collective subjective if you like, but frustratingly unscientific. That’s my hypothesis anyway, I can’t see another reason why there’s no immediate consensus. If I’m right it means that however we try to formally define what it is to be a member of humanity there will always be exception scenarios.
I am sure there cannot be a concensus as long as people want to include undefined categories (soul) in the definition.

Of course my point is that such an inclusion is unnecessary, we can find out objectively if a being is sentient of not, if there there a communication channel established - by using the Turing test. If such a communication channel cannot be established, then we can observe the behavior of this other being, and use the less rigorous method: “human is as human does”. In this letter case the chance of error can be very high. But when we can commincate, the Turing test - while maybe a lengthy process would be also objective, repeatable, scientific and accurate. And since the Turing test does not need the assumption of a nebulous “soul”, the “soul” (whatever it is) is not necessary any more. It will belong to heap of discarded ideas.
 
Let’s make sure that we use the same vocabulary. “Absolute” and “relative” are not the same as “objective” and “subjective”. There is no such thing as “absolute” meaning, but there is “objective” meaning. That is what I tried to explain. If I have a proposition in mind, put it into the communication channel, you receive it, and if your understanding it is very similar to what I intended, then we have a successful communication and the proposition gained “meaning”.
Yes, in this case we have established successful communication, but that does not mean that the proposition has objective meaning. The meaning is still dependent on the subjects allowing it to have that meaning.
Let’s say that I am a space alien and in my language I say “good morning” to you. It just so happens that it sounds like “you are in idiot” - by some strange coincidence. Obviously we have no mutual understanding. What is the “meaning” of “good morning” in this scenario? It has no meaning. A meaning is mutually agreed upon by the sender and the receiver in the communication channel.
And therefore subjective. A meter is a meter, no matter where I go. My agreement is not necessary; it is objective. When I am speaking to the high-school students, I can choose to accept their meanings of slang, or not. It is subjective.
It does give you a “hint”, so to speak. That is why your Turing test is not sufficiently long.
Again, how long is long enough? Do we simply talk until we both decide we’re human? If an experiment has no set end-point, it is not objective.
Yes, it could happen. But I am assuming an open mind, and a willingness to arrive at the correct solution. I would suggest that in the case of ambiguity, let’s err on the side of including someone who might not merit including, rather than excluding someone who should be included. You know: I would prefer to let a 1000 guilty ones to go free, rather then to convict one innocent. I know that not everyone agrees with me.
How wide should our margin of error be?
Yes, it is objective. And it is repeatable by both you and others. If you wish to close the “test” prematurely, that is your business. Unfortunately it would be unreasonable to assume that all of us want to arrive at an objective result. Sadly, many people would want to have their preconceived ideas seem to be corroborated, rather then to let the chips fall where they may. But that is not the problem of the method, it is the problem of the ones who conduct the experiment. 🙂
In these hypothetical scenarios we assume that the person conducting the experiment genuinely wants to arrive at the correct result. The experimenter wishes to minimize both the “type one” and the “type two” errors. (You know: the 'type one" error is to declare someone as “sentient” even though it is not, and “type two” error is to declare someone non-sentient, even though it is.)
But you know, I’m less worried about the humans who show up borderline on the Turing test than the humans who are unable to engage it at all.
 
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