Spidey wrote:I can’t understand your reasoning Jeff, there definitely is a significant difference between the moment just before conception and conception itself, unless you want to look at life and reproduction as one entire continuum. If that’s the case killing someone at “any” point along this continuum, would make no difference.
What is the significant difference then? Let's take whatever moment you call conception. What wasn't true about it one microsecond earlier that didn't make that the moment conception instead?
Spidey wrote:And please don’t bother to explain to me the difference between pre birth and sleep, because I have spent a lot of time working this out, and I can literally see no difference whatsoever, other than having memories to return to, and thus no need to start all over again.
The only two scientific examples I gave in my post were heart beat and appreciable brain activity, each of which I would argue easily apply to a sleeping person. I've talked about self-awareness in other threads, which is perhaps why you brought it up? I think you have a compelling argument for why self-awareness is not a good metric for human life, at least on its own.
Spidey wrote:I really don’t understand this whole “personhood” thing…life is life.
Almost everyone thinks that killing a dog is wrong. Most people don't think the person who does that should be charged with murder though, rather with an animal cruelty crime. Maybe you do? But this is one example where a philosophy where all life is the same fails for most people. And the difference becomes only more stark when we talk about cutting grass, etc.
Spidey wrote:And if a soul exists, it’s just as natural as the rest of existence. You seem to be stuck on this idea that a soul must exist outside of the natural world for some reason. Do you believe in dark energy or dark matter, do you believe in the theory that particles “pop” into and out of existence in a vacuum, all parts of the real world right?
I was describing the religious idea of a supernatural soul, not my own, and how believing in one might draw one to certain conclusions. I suppose you can view the question of when is something a person as when does something get a "soul," but I prefer person here due to soul's historical baggage. It's like if you ask someone if they believe in God, and they say yes, because they define God as love, and they believe in love. If you redefine the word too much, it's somehow no longer a satisfying answer to the original question.