- #36
Tisthammerw
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Moonbear said:The correct biological term that would apply to any stage from fertilization to birth is conceptus.
Hmm, it seems you're right. Makes me wonder why the term never came up in biology class.
Tisthammerw said:Sort of. It's really not potential per se but the nature of the organism itself. Think of it this way: why allow a human newborn to live? It has no more intelligence then my pet cat, nor can it contribute much to society etc. Yet the fact is we have a life form with human DNA (genetically complete) that grows up to be an adult member of its species. So the life form is a person, even if the life form is not fully developed yet. To the very least it's a consistent set of criteria, arguably less arbitrary than the birth criterion.
I'm going to throw a new wrench into the discussion on this point. Currently, at least in some species, we have the ability to use somatic cells to produce clones (i.e., Dolly the sheep). Yes, it's currently inefficient, imperfect, and we still need an oocyte to accomplish it (though, the nucleus is removed, so all of the genetic material comes from the somatic cell). However, as technology progresses, it's quite possible given the current status of this research that the necessary factors in an oocyte for conferring totipotency can be isolated and identified and a somatic cell treated with those without need for any gametes. Regardless of whether we ever choose to use such technology, hypothetically speaking, if it became possible to use it, then any cell in your body would have the potential of being used to make a clone.
Ah, you're forgetting something. Both the fetus and the newborn naturally develop to become adult members of their species when given nourishment. Under the criterion I mentioned (playing devil's advocate, since I am not completely convinced of it), the cell by itself wouldn't be considered a human person. However, if the cell were used/transformed/etc. to create a biological entity that, when given nourishment, grows up to be an adult homo sapiens then it would be considered a human person just as a newborn would.
In other words, the term "potential" is very ambiguous. We are now approaching the level of technology where one could argue any cell in your body has "potential" to be another person.
Let's not forget the clarifying conditions I mentioned earlier: the biological entity is a genetically complete human and naturally develops to be come an adult member of its species when fed nourishment. Under the pro-life argument I am using, when those conditions are met, the biological entity is a human person. As I said earlier, to the very least it's a consistent set of criteria, and arguably less arbitrary than the birth criterion.
I would argue a consistent line be drawn at the beginning of life as for the end of life. That line would be the time at which life can be sustained independently of outside support of the circulatory and respiratory systems, two functions that are internally regulated and without which, survival cannot occur.
And now I get to throw a wrench into this discussion via the use of increasing technology: viability. Suppose we reach the technological point where the conceptus can be retrieved safely at any stage of the pregnancy (I believe this is only a matter of time). The conceptus can now live independently of the mother's circulatory and respiratory systems. Where does personhood begin now? Would you still use your criterion?
Additionally, it its technically true that life exists at conception. Cells are living organisms, and even human cancer cells are alive.
The same conditions would apply to someone choosing to suspend life support for a prematurely born infant as for a terminally ill adult, as for a conceptus still dependent upon maternal circulation. Any other criterion that allows for technological intervention and consideration of "potential" would be subjective relative to the current status of technology, thus is an insufficient criterion.
Agreed. So what criteria would you use? Whether or not the entity requires outside biological support (cardiovascular and respiratory)?
Something either is or is not a person, and the term "potential person," by definition, means something is not a person.
I didn't really use the term “potential person.” “Potential adult” would have been more accurate.
Another consideration if we use the "potential" argument rather than a viability without technological intervention argument, or if we make the case that viability with technological intervention should be considered, then to what extent are we obligated to provide technological intervention to sustain a miscarried conceptus? If a conceptus is considered a person from the earliest stage of development, and a woman miscarries in the first trimester, do we need to attempt to implant the embryo into another surrogate? What would make a miscarried conceptus different from an aborted conceptus? A miscarriage can occur due to a problem with the conceptus or with the woman's reproductive system, thus it is not always the case that miscarriage implies the conceptus has no potential per se, but that the woman carrying that conceptus has something wrong with the way her body functions in supporting a pregnancy. Thus, again, the only way to make this distinction would be to use the criterion of viable without technological intervention. I further specify respiratory and cardiovascular support as the deciding intervention, because those are the systems that distribute oxygen and nourishment to all the other tissues of the body, and without which, brain death is imminent (brain death being the generally accepted criterion for the end of personhood).
Okay, this seems to be the criterion you are using do determine personhood (correct me if I am misunderstanding you). Let’s test it with this hypothetical case: suppose a man suffers a medical condition as a result of a horrible accident that temporarily prohibits him from using many of his damaged organs. He is in a coma and needs to be hooked up to a machine to provide respiratory and cardiovascular support. Nonetheless, in nine months his body will recover and he can live a normal life. Is this man a person when he is in the coma?