All we have is factual questions about how people’s “morality cores” vary in time and from person to person, how compelling their voices are, finding patterns in their outputs, etc. Can someone explain what problem metaethics is supposed to solve?
If there is a problem worth solving, it has to be related to “how compelling their voices are”. In the philosophy of logic, we classify “Modus Ponens” differently from “Appeal to Inappropriate Authority”—and not simply by asking statistically which is more convincing. An empirical discovery that arguments quoting Justin Bieber are highly likely to convince the listener do not move such arguments out of the “fallacy” category. Similarly, if metaethics is worthy of study, it must be able to say that certain arguments are better than others independently of their likelihood to convince the listener, and why.
If you believe that categories like “fallacy” are useless, then logic is just a crude stab at the true science of persuasion. If you believe there is no analogous category in ethics, it’s unlikely that you’ll find anything worthy of study.
I happen to administer a lot of blood to my patients, so let me answer some of the factual questions.
The way they calculate “up to 3 lives” is in the most trivial way: blood you donate is fractionated into red cells, plasma, and platelets. Each of those may go to a different recipient.
All blood administered to patients comes from voluntary, uncompensated donations. Plasma used in research studies may be compensated, but may not be transfused. This is the most important factor keeping our blood supply safe, and is far more effective than laboratory testing alone.
Given that blood banks need to keep a sufficient store of blood available of each type, rarer blood types are generally in greater need than, say, A After all, a larger proportion of blood of those types must be discarded. O blood is obviously highly useful in trauma situations, and is therefore in high demand as well.
The distribution of donors’ and recipients’ blood types should not be assumed to be equal: people with blood type A are significantly more likely to donate than people with blood type B. This exacerbates the discrepancies due to point 3.
The number of lives saved can be calculated in two ways:
a. the feel-good way. Every time a physician gives a unit of blood to a patient e does so believing it is a life-saving procedure. So if 3 units are given the patient’s life was saved 3 times in rapid succession. (You have to be willing to save a life multiple times, because that’s the analysis we’re using for the rest of this discussion: multiple mosquito nets saved the same kid’s life multiple times over his lifetime; that same kid was then saved by anti-diarrheal treatments; etc. The same analysis belongs here). Now, we subtract the number of patients who die, but that’s a small number. So 26 million transfusions/16 million donations = 1.6 lives saved per donation.
b. the marginal way. Donations are currently sufficient for usage; we benefit in three ways from more donations. First, we can be slightly more profligate with trauma patients who have a low survival chance; this saves a minimal number of lives. Second, fresher blood is associated with better outcomes than older blood; the extent of this effect is unknown but is an area of current research interest. The calculation would have to look at the likelihood that your donation reduced the average shelf age of the blood being administered times the survival improvement from the fresher blood. Third, blood from multiparous women is associated with ARDS; an increase in donation would allow us to stop using it.