An eponym is something that is named after a particular person. I would like to put forward a radical assertion: The habit of naming an idea or principle in honor of its purported discoverer or developer is holding Science back. Therefore, eponyms have no legitimate place in Science (with a capital S).
Eponyms are quiet ubiquitous – particularly in Science – and seem innocent enough. They really are everywhere, from the classical Archimedian principle, the endearing Triangle and Wager of Pascal to the more preposterous “paradox of Moravec” (which reeks of equally odious and insufferable titles such as “The Bourne Supremacy”, “The Prometheus Deception”, “The Bernstein Presumption” or “The Sternberg Allegation”). So what’s the fuss?
It is actually prudent to take a solid stance on this issue, as infecting the scientific vernacular with eponyms introduces at least three serious problems:
- The issue of credit. It has been noted – and justly so – that it is the rare principle that it actually named after the guy (sorry gals, it is usually a guy, at least historically) who came up with it. This has been made into a sarcastic meta-eponym itself: Stigler’s law of eponymy, which is as self-consistent as it is self-defeating, as this principle was originally proposed by Robert Merton (and probably by others before him). These things can get rather thorny. Scientists are people, too. Misattribution of credit is one of the few things that can rile up the typical scientist so much that he forgets his good upbringing. A prominent instantiation of this spectacle can be observed at the Nobel prizes, pretty much annually. A scientist scorned truly it not a pretty sight. This issue also tends to confuse the serious student of the history of science, for no good reason. Moreover, we haven’t even touched the problems associated with using common names such as Smith or Miller for eponyms (to say nothing of the potential confusion that looms once Chinese science make a genuine comeback).
- It perpetuates outdated views of the scientific enterprise. As of this writing, the 21st century is well underway. Romantic notions that the lone hero, the renaissance man of yore who is doing it all by himself (in his basement lab, no less) are extremely outdated. This is simply not how science is done these days, no matter how accomplished the individual in question, even if it makes for excellent copy. True advances in a particular field are usually associated with large teams or even groups of teams. Even if there is a primus inter pares (as in the last sentence), it seems unproportional to attribute all of the success to one or two individuals. This is well reflected in the increasing number of authors on a given paper – to the point that a lone author is starting to raise eyebrows. There is no question that the public still has the “mad scientist in his basement” view of science, which is also being kept alive by movies (the only question remaining whether the scientist in question is sinister, crazy or both). No matter how much this view flatters the vanities of the denizens of the ivory tower, which are otherwise terribly starved of recognition, it is time to do away with it. It is simply no longer accurate, if it ever was.
- It actually slows down progress. This is the most serious of the charges, and we will spend the remainder of this essay elaborating on it.
This problem is not intuitive, so we will have to develop it. I will call this the “parable of the Berlin taxi driver”. As in other places, prospective taxi drivers in Berlin (and other German cities) have to obtain a government license before they can go about their business. Part of this licensing procedure is the so-called “Ortskundeprüfung”. Innocently named, it is a serious obstacle to becoming a taxi driver in Berlin (and in other major German cities). In this exam, one has to demonstrate appropriate knowledge of the local roads and how to get to a particular destination. Typical prospective cabbies in Berlin are known to study for several intense months for this exam, even attend schools that are specialized to prepare for the exam (at considerable fees). Yet, the failure rate at the actual exam still is substantial. The reason why it is so hard to learn how to get around in Berlin is twofold:
a) The physical layout of the city is pretty much random (constrained by some geographic features, but otherwise without organizing principle).
b) Superimposed on this randomness is a random naming “convention” of streets. Any given street (and there are plenty of them in Berlin) can have pretty much any name. Due to the fact that Berlin was once divided, one can have even the same street name in different districts, but that is a negligible idiosyncracy.
So the long preparation time and high failure rate of the exam is not surprising. Both spatial and linguistic long term memory are taxed to the hilt. The prospective cabbie has to learn – by heart - thousands upon thousands of otherwise meaningless associations.
Contrast this with the situation in Manhattan. The actual physical layout of the city is systematic – save for the extreme lower end, Manhattan famously is composed of blocks which are arranged in a grid. On top of the physical grid, a meaningful naming convention is superimposed. This is incredibly efficient, as “how to navigate Manhattan” (as a cab driver or otherwise) can be communicated in a New York minute, not months, with very few demands on precious memory resources. Ready? Here goes:
- Avenues run parallel to the Hudson river (roughly north/south) while Streets run perpendicular (roughly East/West).
- Streets and Avenues are consecutively numbered with integers, increasing from east to west and from south to north.
- Each house number in a Street exists twice, once east and once west. The dividing line between east and west is 5th Avenue.
- Almost all Avenues and Streets are one-way, with even-numbered ones going north and east, while odd-numbered ones are going south and west. The opposite is true for Avenues east of 5th.
- There are a few exceptions to the rules above – there are some additional north-south connections such as Broadyway, Madison and Lexington Avenue. Also, Manhattan below Houston Street does not entirely follow the conventions above.
That’s it. Really. You are now good to move about Manhattan. I think you will be able to quickly reach 90+% of your potential destinations without any problems.
Note that this remarkable efficiency comes about because we are taking advantage of the structure inherent in both the physical layout as well as the naming of the streets of Manhattan. In Berlin, we can not do that. Randomness does not lend itself to compression (this is one of the bedrock principles of information theory).
Now, the Manhattan case is somewhat disingenious (for our purposes). Applying this principle to science, we are not at liberty of laying out the “city” however we please. That – of course – is given to us by nature. However, it is important to note that the geometric structure of reality (in however many conceptual dimensions) is somewhere in between the complete randomness of Berlin and the simple 2-dimensional grid of Manhattan. If it were otherwise, science would not be possible (in the case of complete randomness) or trivial (in the case of the grid).
At this point, I would like to provide a reminder of what science is trying to achieve. It is trying to elicit the principles that govern reality in a systematic – and hopefully – efficient way. Given what is the goal of science – compressing the apparent complexity of the external world into as few underlying principles as possible(an enterprise that is both platonic and modern. In this sense, Science is not unlike the jpeg-format).
But while we are not at liberty to design the structure of reality itself (at this point in time, at least), we are at liberty to name the uncovered principles in whichever way we please.
This explains why eponyms in science are as common as they are damaging. Giving these principles the name of the purported pioneer is the simplest, easiest, but also laziest thing to do. Names – by their very nature – have nominal scale niveau. Any potential structural relationships between principles and ideas (that map on the principles of the real world) are irretrievably lost. This is a big deal, as the scope of science continues to expand. This forces professional scientists into ever smaller specialties, and even threatens genuine progress, as old knowledge is forgotten and rediscovered under different names, see for instance the “flash-lag effect“, which was “discovered” in 1994 by Nijhawan. Before that, it was “discovered” by McKay in 1958 (McKay effect) and before that, it was “discovered” by Fröhlich as the “Fröhlich-effect” in 1923. It is now known as the “flash-lag illusion”. For the scientist, this is equally frustrating and confusing. In addition to fostering forgetting in science (the ultimate bane of the scientist), progress is also stifled in different ways: Learning a new field by relating new ideas to old ones, and by molding cognitive relationships in the shape of the conceptual relationships in the real world makes for rapid learning. If the concepts in the field are such that they simply have to be learned by heart and are meaningless otherwise, there is no advantage in already knowing something. The new concept still has to be learned afresh. This is intimidating. Even fundamental and otherwise trivial concepts, such as a Herzsprung-Russell diagram or the Mahalanobis distance start to appear alien and forbidding to those who don’t already know them. Of course, this adds to the appeal of introducing them. Those who area already in the know, those who have already taken these cognitive hurdles, have an advantage over the beginner - nothing to be scoffed at in an increasingly competitive scientific landscape. Also, it allows to flatter the more eminent colleagues. But it does sacrifice the cognitive efficiency that a true structural geometry of ideas in a given field would allow. It is not easy and for free to generate this geometry. But it can – and should be done. Everyone will be better off in the long run.
One successful illustration comes in the form of simple concepts: units. “Newtons” are a classical case. A unit of force, to be sure. But what is the meaning of a Newton? It seems quite obscure, whereas the same unit in SI base m x kg /s^2 is immediately meaningful . A prominent case from Neuroscience is the unit of firing rates. Events (or spikes) per second is immediately meaningful, even to the outsider. Calling it “Hertz” or “Adrians” is not (more on this later). The rest of the conceptual landscape of science necessarily needs to follow. Mathematicians and Physicists – for all their professional snobbery towards the rest of the scientific and academic enterprise (in an ironic reversal of the medieval order which prioritized theology, law, and so on above all the others) tend to be the worst offenders. Thus, I call for a “SI base” of concepts for all the sciences. In analogy to the unit case, the mission of science is to identify a few underlying principles and characterize the relations between them. A formidable challenge to theorists, to be sure, but one that needs to be met. We do need a meaningful language of ideas, if we are to succeed in the long run. This issue goes beyond eponyms. For instance, psychological concepts are often tainted by their equally named everyday meaning, giving novices in the art the dangerous notion that they know what the experts are talking about when they discuss things like personality or intelligence. In short, we need a serious language of science. Using eponyms hides our ignorance about the underlying conceptual structure of reality, particularly the relationships between the concepts themselves. But eponyms are only one apparent manifestation of the problem we are facing and the shortcomings that we are dealing with. In the long run, this will not do. It is not sufficient to assert that “Mathematics is the language of science”, as some do. Mathematics is no such thing. While logic is certainly necessary, sciences requires more than that. Mere internal consistency is sufficient for purely logical disciplines such as Mathematics or Philosophy, but not Science, which is concerned with the external world. The logic of mathematics needs to be related to the structure of the external world. Making these connections is presicely what a language does, and what we are sorely lacking. We are in desperate need of a precise scientific language.
To conclude, it is ok to use eponyms for things that don’t matter or that have no inherent structure. Thus, there is a place for eponyms, but science is not that place. The costs of using them in science are too high.
There also several revealing examples.
What is more informative to the outsider – “the Carrington event” (which sounds like the title of a cheap thriller) or “the solar storm of 1859″? They both refer to the same thing, but the latter is descriptive enough even for those unfamiliar with the actual event to have a rough idea what the term refers to whereas the former is not.
What’s worse is that language evokes associations. For instance, the concept of “Granger causality” sounds ominous, complicated and obscure. Maybe it is related to Lagrange points? Not at all. It is a very straightforward (and intuitively plausible, if not uncontested) concept relating two time series, going beyond mere correlation and taking the sequence of events into account.
This seems to be a particular problem in medicine. Of course, it *is* understandable why people might want to use them. “Capgras syndrome” is named after the person who first described it and it sounds much more authoritative to say: “You have Capgras syndrome” (implying that we understand what is going on), rather than just saying “You have an illusion of doubles” (which is how Capgras himself described it). So there is an incentive misalignment. The practitioner has an incentive to sound more authoritative than is warranted by our understanding of the syndrome (which might be reassuring to the patient), while at the same time widening the gulf between those who know the lingo and those who don’t. Moreover, it elegantly solves (however imperfectly) the credit problem. Without eponyms, the original discoverer/describer of a condition is soon forgotten. Source memory problems and cognitive economy will see to that. Who first described the “circle of Willis”? Who first described any other vascular structure? Perhaps there is a reason why Vesalius is all but forgotten.
But if people want to go with eponyms, at least be consistent. For instance, handwashing by doctors (still not happening nearly enough, despite a record of extreme effectiveness) should be referred to as “the Semmelweis maneuver”. Daltonism or color blindness? Or maybe atomic theory? Can be confusing if a great man did more than one great thing…
As Kant observed: “Ärzte glauben, ihrem Patienten sehr viel genützt zu haben, wenn sie seiner Krankheit einen Namen geben.” – well then let’s make sure it is a good one.
There are many things one could call a “Schmitt trigger”, but calling it a Schmitt trigger doesn’t help anyone who doesn’t already know what that is. Barlow’s Syndrome or Mitral valve prolapse? If you could pick any term, which one would you choose? The same goes for Martin-Bell syndrome vs. the much more descriptive “fragile X syndrome”.
I rest my case.
Actually, I don’t. Concepts can have strong connotations. Can anyone picture what Hermite functions look like (without knowing anything else about them)? Or – in the age of Mad Men – what a Draper point is? Which is why I do all my signal processing with Kaiser windows (no affiliation with Microsoft or Wilhelm II). Speaking of signal processing – do you prefer kernel density estimation or Parzen-Rosenblatt window methods?
See here for a spirited discussion of these issues. barefoot