[Right Wing Professor]

You know that the genetic information contained in those cells determines what kind of creature it is. If any of those embryos were grown in an environment other than the mother, it still would grow into the creature that the genes determine not the environment.

The original debate was over how you determine what is human. You're saying, practically speaking, you can't, since I presume you're neither adept at DNA sequencing nor implantation, and implantation is a low-probability event anyway. And a mere 30 years ago, no one would have been able to.

[metmom]

The human is determined by DNA. A human sperm and human egg produce a human zygote which, given enough time, grows into an adult human being. Do scientists have a different method for determining what a human is than genetics? Or any other animal, for that matter.