ss:

zygotes/embryos/fetuses arent responsive or conscious that early on. theyre not self aware, and you cant know that animals are not self aware. sperm are required for the natural formation of a human being - your "chance of developing into a human being" argument is just as applicable to a fetus thats incapable of survival outside of the uterus, both depend on specific circumstances.

the likelihood of criminals escaping is not that high, not when theyve murdered. besides, thats not really the point. if youre open to killing in one set of circumstances, your right to life argument goes out the window, unless youre referring to something constitutional, in which case your example on law breakers is inapplicable to the unborn.

"Slavery used to be legal too. Are you saying that people were entitled to own slaves when it was legal? You agree that they deserved the right to own slaves?"

i thought you were being figurative with "right" that time, as in legality. nevermind.

__________________