You, saying that a sperm does not have the potential of human life, because it is dependent upon passing through the cervix and entering an egg, is truly no different than saying that the zygote does not have potential for human life unless it is able to make the journey through the fallopian tube to the uterus.
I am sorry you do not find it satisfactory. At this point we are just talking back and forth -- the relevant arguments have been made. I am not over-simplifying it. You are over-complicating it by adding in extra "What If" factors that are not related to the question at hand.
The portion I quoted above is an example of over-complicating, but it is also not an accurate comparison. I suppose the problem is that you don't understand the difference between fertilized and not fertilized. I will try to break this point down further.
A sperm alone can
never become life.
An egg alone can
never become life.
The distance from the sperm to the egg is irrelevant. If that distance is never traversed, it means nothing.
Once the egg is fertilized,
then it becomes potential life -- and at
no stage before this is it
ever potential life.
Once the fertilized egg develops into a zygote,
then it is life -- and at
no stage before this is considered to be life.
Once it is life (i.e. a zygote), it is a separate, individual, human life (which is legally defined as a "person," if you want to get into legal terms), and this stage is
only possible if
each of the steps leading up to this point occur.
If the sperm and egg never meet, there is
zero potential for life.
The distance from the sperm to the egg is irrelevant.
The only relevant factor is IF the sperm and egg DO meet.
I hope this breakdown helps -- but it can only help if you take the time to read it slowly and understand the concepts involved.
"What Ifs" like
potential birth defects, or rare birth deformities, or any type of twin formation are
irrelevant to the conversation.
Those are merely "What Ifs," at this point, as far as this conversation is concerned, and can only serve to stray you from the answer you seek.
Those "What Ifs" are a separate and different conversation. We are talking about the point at which a human life becomes a human life. In regards to that question, those are not related and are a separate topic.
If you come to understand the facts that I have laid out in this post and previous posts, you will see that there is no contradiction in my argument. You may see one now, but it is not in fact a contradiction because a sperm -- even on its way toward an egg -- is
not potential life. Only the fertilized egg is potential life. You are perhaps thinking in terms of "but, potentially, if the sperm enters the uterus and fertilizes the egg, that would mean the sperm is potential life too!" but that is not how it works. It is only potential life once the sperm fertilizes the egg. Before that point, anything is possible in the mess of quantum possibilities, so it is useless and irrelevant to talk about before the point of fertilization.
A zygote is more than just a "DNA blueprint." It is much more than that; the "DNA blueprint" is contained within the zygote, but a zygote is more than just a blueprint. It is a very, very young human being.
Please do not just give this post one quick read through and then make a quick post in response out of emotion. If you are not going to carefully read and give your full attention to trying to understand what I am trying to say, then there is no reason for me to continue trying to explain it, because at that point it means you are merely arguing for the sake of argument rather than trying to see the other side.