I spent an hour recently talking with a semiotics professor who was trying to explain semiotics to me. He was very patient, and so was I, and at the end of an hour I concluded that semiotics is like Indian chakra-based medicine: a set of heuristic practices that work well in a lot of situations, justified by complete bullshit.
I learned that semioticians, or at least this semiotician:
- believe that what they are doing is not philosophy, but a superset of mathematics and logic
- use an ontology, vocabulary, and arguments taken from medieval scholastics, including Scotus
- oppose the use of operational definitions
- believe in the reality of something like Platonic essences
- look down on logic, rationality, reductionism, the Enlightenment, and eliminative materialism. He said that semiotics includes logic as a special, degenerate case, and that semiotics includes extra-logical, extra-computational reasoning.
- seems to believe people have an extra-computational ability to make correct judgements at better-than-random probability that have no logical basis
- claims materialism and reason each explain only a minority of the things they are supposed to explain
- claims to have a complete, exhaustive, final theory of how thinking and reasoning works, and of the categories of reality.
When I've read short, simple introductions to semiotics, they didn't say this. They didn't say anything I could understand that wasn't trivial. I still haven't found one meaningful claim made by semioticians, or one use for semiotics. I don't need to read a 300-page tome to understand that the 'C' on a cold-water faucet signifies cold water. The only example he gave me of its use is in constructing more-persuasive advertisements.
(Now I want to see an episode of Mad Men where they hire a semotician to sell cigarettes.)
Are there multiple "sciences" all using the name "semiotics"? Does semiotics make any falsifiable claims? Does it make any claims whose meanings can be uniquely determined and that were not claimed before semiotics?
His notion of "essence" is not the same as Plato's; tokens rather than types have essences, but they are distinct from their physical instantiation. So it's a tripartite Platonism. Semioticians take this division of reality into the physical instantiation, the objective type, and the subjective token, and argue that there are only 10 possible combinations of these things, which therefore provide a complete enumeration of the possible categories of concepts. There was more to it than that, but I didn't follow all the distinctions. He had several different ways of saying "token, type, unbound variable", and seemed to think they were all different.
Really it all seemed like taking logic back to the middle ages.
There may or may not be some legitimate field of inquiry going under the name of semiotics. In grad school a number of years ago, however, I took a (graduate-level) Introduction to Semiotics that was a pretty remarkable hodgepodge of bullshit, along with just enough non-bullshit to make a complete outsider like myself (not at all fluent in the obscurantist discourse of "cultural studies," "critical theory," and the like) feel like maybe the problem was me and not the material. (Later reflection gave me a lot more confidence that the problem was, in fact, the material.)
Among the reading was Freud, Lacan, Derrida, J. L. Austin, Marcel Mauss, Saussure, Lévi-Strauss, and Peirce. (There was other stuff too that I don't recall right now.) Interestingly, of those I would say that only Lacan and Derrida were outright charlatans (which is not to endorse any of the others in particular, just to say that they were all doing something at least potentially more valuable than pulling stuff out of their asses). But the writings of the non-charlatans were presented so confusingly and tendentiously that it never remotely cohered into any sense that semiotics was a field with any integrity of its own or anything useful to contribute. That is to say, none of those thinkers would have described himself as a "semiotician," so it was very much a post hoc attempt to put a framework around a bunch of very diverse writing that in many cases was pretty foreign to its original intent.
This is all n=1, of course, but on that basis I tend to think that semiotics as a standalone field is probably more or less as you say it is.
I like how you call it "a set of heuristic practices that work well in a lot of situations, justified by complete bullshit." Because my first instinct when writing this comment was to include a remark to the effect that even if theoretical semiotics is mostly or entirely crap, there is some valuable work that calls itself some variety of applied semiotics. For example, there are some people who do musical semiotics, and—since it's not at all obvious what music signifies and how it does so, either in the general or specific cases—I have found some of that work enlightening. But on further thought, you're absolutely right in your characterization of it. Musical semiotics can be full of insight, but its adoption of the theoretical apparatus of (e.g.) Roland Barthes or Umberto Eco is no part of its value—that, instead, is an attempt to bring "theoretical" rigor to a fundamentally nonrigorous enterprise. So much the worse for any "application" of semiotics if it relies on the cesspool of semiotic theory to back up its assertions.
Just to be clear, when reading any of Charles Sanders Pierce i have never gotten a hint of "Charlatanism". Including Peirce among those names amounts to blasphemy.