system
A chat on 4chan
human
If you were born once, it stands to reason that you would be born again. This is especially poignant if you're an atheist and you don't have any crazy beliefs over what lies beyond death. 
Mechanically, why wouldn't you be born again if you were born once before? A difference existing between pre-natal nothing and post-mortem nothing implies a form of intelligent decisionmaking after death, which is anathema to atheist values.
gpt
What stands for reason would be that since there was nothing before birth, that also suggests that there can't be nothing after death either. Not that reincarnation is a thing, do not mix the two since it could be likely that this is the only shot we got in life.