Gothmog said:
First let me say that Keirador's argument is not fresh at all, I've heard it a million times. It's called an argument from authority. In this case it is not only a logical fallacy, it is also a blatent lie.
Argument from authority is not always a logical fallacy, in fact more often than not it is necessary, as there is too much knowledge for every individual to know. If you reject all information that you personally did not discover, you will come to know very little. I am quite positive that you have accepted tens of thousands of arguments from authority in your lifetime, as you have undergone extensive education, which (apart from lab work) is nothing
but argument from authority. Unless you can personally verify everything you've learned in school without appealing to an authority. The only issue is whether or not the authority I appeal to is credible. I will try to gather some citations for you tomorrow.
Gothmog said:
Even if I allow that a separate organism is created at conception (which I don't), you still have made the jump from there to 'the killing of this person', a non sequitur. One might more reasonably ask: is the destruction of this Zygote justified? There is a specific scientific definition of Zygote.
I have no legal argument against the bolded phrase. The state already finds it acceptable to end lives in some cases, it's not a stretch to include developing humans within the class of people whose lives are not protected.
But why wouldn't you allow that a separate organism is created at conception? That which I have learned of biology is, I am sure, a molehill to your mountain, me still being in high school and you being a scientist, but my AP Bio texts state conception as the beginning of the organism's life cycle, when it is first differentiated from both parents. These are secular books, distributed on a national basis. Are they lying to us? I am of course open to new information, my current opinions being based only on those facts which I have learned.
If it is fact that an organism's life begins at conception, how is it a non-sequitur to refer to that organism as a person? If it is an organism, it is most assuredly a human. What other organism could it be?
Gothmog said:
As for the idea that modern biology supports the opinion that the moment a sperm and egg join to form a diploid zygote that object is human, this is a stretch even beyond the existence of God IMO.
Oh? Then what organism is it? Or do you mean human in some mystical sense, rather than as a member of the human species?
Gothmog said:
Are identical twins then the same human? What about artificially produced zygotes? Or, in a real twist, what about clones? There is no zygote as such in that case as there were no haploid cells involved. Would a human clone then not be human? Is a sheep clone not a sheep?
Identical twins are the same person for a time, until the zygote divides into two separate zygotes.
Gothmog said:
Please don't use the term 'potential human' to me, as others have aluded to this is not relevant. A lump of stone is a potential automobile, and every day is potentially my last. I put as much stock in potentiallity as I do in free will. They are intellectual concepts that are worth pondering but mean nothing in the real world.
Point out to me where I used the term "potential human". I wasn't aware I was using the term, and will cease immediately if I have been, as I find it a stupid idea. Things are either humans or they are not. According to my ideaology, developing humans are still humans, regardless of their stage of development. I don't consider teenagers to be "potential humans" just because they're not done developing, embryos are no different.
Gothmog said:
Just because an undifferentiated cell may at some point in the future become part of a brain, that does not make it a brain or even part of a brain.
Again, you seem to be shooting down a claim I never made. I would expect better from a man of your learning than a strawman logical fallacy, I'm quite certain you are smart enough not to have to resort to it.
Gothmog said:
If you consider an undiferentiated lump of cells human, that's your call. If you think an embryo human, again your call. You could even call a single zygote, a detached limb, or clump of hair, human if you like.
But to think that your definition is any more or less arbitrary than anyone elses is the antithesis of logic and has nothing to do with science.
]It is not that saying that a human is made at the moment of conception is foolish, it is trying to pass that off as a biological fact that is foolish.
Again, the logical fallacy you accuse me of, "argument from authority" is not done so intentionally. If my biology books are wrong, and life begins at some other point, and you have an equally or more valid source for this assertion, I am more than open to your correction.