I take it as understood that basic, uncontroversial science is accepted as evidence in this debate. Animals have nervous systems very much like ours that are designed to transmit and express feelings of pain. Stem cells and plants do not. There is nothing goofy about “frame of reference” here. No “interpretation.” There are certainly lines of gray between similar creatures, but that doesn’t prevent us from seeing the vast chasm of difference between two beings that are VERY different from each other in their capacities. Animals feel pain. Stem cells don’t have any more demonstrable capability to feel pain than do rocks. Indeed, stem cells cannot feel pain just like individual cells in your body cannot feel pain.
Unless you want to start declaring that rocks feel pain when broken, you can’t get away with making up pain and suffering. You have to point to some actual FUNCTIONAL system that plausibly links particular actions to experiences like pain that are felt by something. We may not know how a brain gives rise to experience, but no one in any other situation questions whether one is necessary to experience anything. Only when the sticky trouble of comparing animals to stem cells arises do people like you start trying to claim that it’s all an arbitrary matter of opinion.
The problem is that you can’t just arbitrarily lump things into categories with no underlying reasoning other than which creatures you like best. You have to present some underlying account as to WHY a particular being is worthy of moral consideration: what rules things in and out? What about them makes it so?
And in doing so, you face the trouble that stem cells, whatever their possible future, are very very different sorts of beings from human adults, which are, in virtually every functional way, much more similar to animals than they are to stem cells.
Actually, that’s not strictly true. The hurdle is technological, not fundamental. Regardless, whether something has potential to do something does not make it so. That you have the potential to earn a million dollars doesn’t mean you can spend it now. The potential of the stem cell is no different from the potential of the separate sperm and eggs to develop into a separate human individual.
In short, that argument is simply dirt poor.
I can throw it out because a) its a bogus argument on its own merits, as I’ve repeatedly outlined, and b) the very people who make this argument hypocritically never apply it to any other situation in which rights or morality is involved.
Sure: and I am allowed to point out that their moral system is full of shit and nonsensical and probably misses the whole point of being moral.