Skin cells will not grow into a human being. Nice try.
Firstly you didn’t address my point, do you conciser an apple seed to be a tree? If not explain why my comparison is invalid.
Whenever I’ve heard pro-lifers redefine human they refer to anything with a human genome, this includes a skin cell. Because this isn’t definition fails you are attempting to redefine the word again.
As for the the “unique” part what about identical twins or chimeras?
Do identical twins count as 1 person?
To chimeras count as two people?
Sentience, conciousness and the capacity for suffering are a far better way to decide if an organism is worthy of rights.