However, my state of non-existence ended at my birth. Just as my state of existence will end at my death.
In this regard, the future is not exactly like the past. In the past, there was never a time in which I came into existence. In the future, there was a time where I came into existence. Neither of those statements transfer between past and future.
This is "memory", or "trace". Their existence take away from your non-existence, making it incomplete (imperfect), which indeed makes one's future different from one's past.
I'm not sure of that, yet. We haven't managed to pin down what "I" is or even what "existence" is. I'm thinking in the "we virtualized a copy of your brain" sense - just what is consciousness?
Indeed, the very existence (and non-existence) could be relative - just like time and space. For example, in one frame of reference there may exist a magnetic field while in the other there may be none.
From a purely entropic and information theoretic standpoint, these are very different states and certainly not a safe assumption.
On the other hand, one might argue that (for example) wasted sperm and eggs should count as "not born". But even that can be seen as too limiting, because - perhaps, somewhat paradoxically - to be completely objective one should be considering statistical parameters rather than a physical measure.
However, that still says nothing of the difference between dying and not being born. Just because things have a large similarity does not mean they are equal, after all.
Your odd argument that "wasted" sperm and such should somehow count towards "born/not born" just seems a non-sequitor. That is quite literally unrelated. The sperm/egg are merely mechanisms and say nothing of the person unless we plan on presupposing a conscious person exists before they exist.
Doesn't look like anything to me.
Unfortunately this argument doesn't hold water when someone tries to say that their god intervenes and decides to overcome man-made barriers to fertilization, because that particular special snowflake baby needs to be born. Unsure why the soul assigned to that fertilized egg doesn't just find another but that just goes to show how messy the whole damn debate is.
Incidentally, this is also my argument against me having babies - knowing that regardless of the number of babies I have, I will feel unconditional love and gratitude at each and every one's existence, and because I can't possibly compare my comfort or economic well being against the value of a human life, the only logical conclusion I can come to is I should have as many babies as I physically can. Or, I should have none.
Consider quantity vs. quality, though. Quoting Lenin, "We must follow the rule: Better fewer, but better. We must follow the rule: Better get good human material in two or even three years than work in haste without hope of getting any at all." 'None' would be the best choice here: you could, instead, adopt a child and by doing so save a life and contribute to keeping the human population within reasonable bounds at the same time!
That's the thing with free will - if it's free, then it can choose things that will prevent (for example) the woman who will discover a general cure for cancer from being born. Just as a random guy with a knife can prevent that same woman from publishing the cure she figured out last night when he stabs her to death in an alley in Queens. "Free will without consequences" is as nonsensical as "rights without duties".
I mean, I get that these are fun discussions to have. Likely even meaningful. But the odd friction this is adding to enter the conversation seems overblown.
Did I ask you to be "explicit/exact"? I'm just curious for you to describe, at all, the supposed "substantial difference" that you apparently know of between being "not yet born" and being "dead".
>Two stars in the sky have an obvious substantial difference between their existences.
In what way are two stars analogous at all to being not yet born and being dead?