Apparently, you didn't read the rest of my post very well. These 'motives' are lip service. "So... saving human lives (the ends) don't justify transplanting a few animal cells into some other animals (the means)???"
No, the ends (maybe coming up with some use down the road) don't justify the means (transplanting human brain tissue into a mouse).
"if a pig can be created that gives transfusable human blood and transplantable organs... what is your *real* problem?"
I've already stated the *real* problem. Mankind trying to play at being God.
After all, if we can transplant cells into a pig to 'create' transplantable organs, what's wrong with creating humans with a pig's brain for the same purpose?
Evil and sick.
> These 'motives' are lip service.
I'm sure that if *YOU* were doing these experiments, that would be so. But you are improperly trying to view the motives of other people through your own worldview. You are almost certainly wrong.
I might as well see every single person who is evangelising, preaching, witnessing, etc. as being selfish bastards tryign to bribe their way into heaven... any motives given about caring for the souls of their fellow man is just "lip service."
> Mankind trying to play at being God.
People made the same complaint throughout all of medical history. Would you turn down a blood transfusion?
> if we can transplant cells into a pig to 'create' transplantable organs, what's wrong with creating humans with a pig's brain for the same purpose?
Ye gods. The Eurocrats "Precaution Principle" strikes again.
Besides: if you can create an entire human, ostensibly for transplant purposes, why give it a brain *at* *all*? You can't tranplant brains, and all a brain would do would be to give the body ideas. Create it with just a minimal brain stem to keep the organs running. No brain, no mind, no soul, no problem. Creepy, maybe, but hardly unethical or even "playing god."