You always could be more brief, but you seem to prefer a word soup, in unrequited efforts with failed attempts to bolster your arguments.
So it seems to me that you don't know when personhood begins, and you feel the need to lean on religion for this definition, while at the same time rejecting such religious definitions, and unable to come up with one yourself. How's that supposed to work? If that is in fact the case, then I must yield, as I am left with great confusion as to your positions.
If that is in fact not the case, then my defense is that subjective definitions lie within the individual, and that those individual definitions may be made by both religious individuals as well as atheists. If atheists are also to self-discern this subjective point, then by definition it is not a religious concept.