by Dave Maier
A few posts ago I distinguished between philosophical and scientific/practical questions about the objectivity of science, and urged that we not get them mixed up. There’s a lot more to say about that, so here’s another chapter in our continuing story.
Philosophical questions about objectivity are metaphysical questions, and of course we invite confusion right away if we insist that as scientists we don’t do that metaphysics stuff (as if one could somehow avoid metaphysical commitments simply by saying so). A closely related question (or a different aspect of the same one) is that of the relation between fact and value. Whether they affirm it or deny it, all sides seem okay with calling this the “fact-value dichotomy,” so that’s what we’ll do too.
This dichotomy is also called the “is-ought” question. It’s pretty obvious that there’s a literal difference between asking how things are and whether they should be that way, but that doesn’t entail that the former questions are objective and the latter not (and of course this is where our question morphs into our earlier question about objectivity anyway). The natural context for this question (although not, as we shall see, the only one) is that of the objectivity of morality; and here too we see an obvious (if not conclusive) difference between scientific and moral questions. As Gilbert Harman points out, moral questions are not subject to experimental confirmation. If we want to know whether murder is wrong, we can’t just murder a number of people (under proper test conditions), crunch the numbers, and see. That doesn’t make sense.
As always, though, the problem with dichotomies is that they make it seem that if we’re not on one side of the fence then we’re on the other, and that’s all there is to it. (It doesn’t help matters that there are plenty of cases in which this is perfectly true; philosophy tends not to be one of them though.) Just because we can’t establish the truth or falsity of moral judgments experimentally doesn’t mean they can’t be true or objective or whatever you want.
But even so, how does this work? Not surprisingly, there are better and worse ways to think about this. Here’s a hopefully instructive look at one of the latter.
One sort of conversation I learned to avoid early on in life was one which pits Science vs. Religion. [Full disclosure: I was a card-carrying “skeptic” and subscribed for several teenage years to Skeptical Inquirer magazine, each issue of which features multiple insufferably condescending “debunkings” of this or that superstitious nonsense, whether this be the doctrine of transubstantiation or that Bigfoot is retired and living in Mexico (okay, I made that one up), so when I say I learned this “early on,” I don’t mean (*cough*) immediately.] I mean the sort of conversation in which participants may deem it significant that, for example, Isaac Newton (or some other certified Smart Science Guy) was a religious believer or that at one point the Bible seems to indicate that pi = 3. That sort of thing.
There are many reasons to avoid such conversations; one is that the fact-value dichotomy or its negation is often, as are many ideas in this context, used as a bludgeon.
