I find this a curious position, based purely on emotion, whereas they feel there is a logical reason to believe this.
NaturalWay suggests that:
Now if we can only define personhood.1) Secular philosophy alone can be used to establish that the condition of "personhood" brings with it the right of self-ownership.
And this is important because. . .?2) Distinction of a human zygote from its human mother is a demonstrable, repeatable process which requires no faith.
I would be interested in seeing such logic. I have never seen this position successfully defended.3) The "personhood" of the zygote can be inferred from logic and this philosophy without appeal to personal beliefs or emotion.
Is there a logical reason to believe that personhood begins at conception?