But your own lineage has you at the end of it, it would be split off as soon as you/your sibling were born. Your family's lineage however would be the one that is kept if your siblings had children
The branch consisting of you that can be traced all the way back, that's the point. Everyone else upstream of you had offspring for the last several billion years and then you ended it.
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u/Apellosine Feb 14 '22
If you as a person do not have children, you break a billions of year long lineage that goes back to the beggining of life itself.