Welcome back to "Doggerel," where I ramble on about words and phrases that are misused, abused, or just plain meaningless.
This particular Doggerel entry is a bit different from the standard sorts: It's usually only spoken in between the lines, most commonly when someone is faced with a question of "how."
I've seen a few minor arguments in my corner of the blogosphere over whether to call what doctors and medical scientists do "evidence-based medicine" or "science-based medicine." While both terms leave a good impression on me, those who favored SBM pointed out an important issue: Prior plausibility. Before investing time, money, and effort into investigating something, it's reasonable to expect an explanation for why a particular treatment might work. By asking that question and putting it in the context of what other research has shown and raised questions about, researchers can focus on more realistic ideas, instead of investigating any claim, no matter how implausible, as if all ideas were equal.
While it's true that we must bow to what good evidence says, we have to exercise pragmatism in what we study because we only have finite resources. Without looking at or presenting the larger picture of the controversies (manufactured or otherwise), a skeptic can doom himself to "play whack-a-mole" with every claimant on the internet. Demanding evidence is a good practice, but it should also come with a demand for a plausible explanation.
In my naive, pre-skepticism days, I remember a little thing from a Star Trek: The Next Generation episode that planted one of the first seeds of doubt when it comes to psychic powers: Dr. Crusher talked about Lwuxana Troi's "psilosynine" levels: A neurochemical involved in her telepathic powers. My belief in the possibility of psychic powers took a big hit: How could psychic powers work? How do the chemicals in someone's brain make all these things happen? Parapsychologists have been studying the subject for a long time, but none of the stuff I had heard or read about the topic had any guesses. I'd later come to hear invocations of quantum mechanics, but with all the tests physicists can do, you would think there'd be at least one psychic who could make an electron zig when it's expected to zag.
That's the problem with so many forms of pseudoscience: They don't explain anything, and are more often used as a wall against explanation and investigation. Even in fantasy, "It's Magic!" falls short with me: I prefer my fantasy to have consistent rules with its "phlebotinum." Without rules like that, it's easy for writers to pull things out of their back pocket to justify unforeseeable plot twists. Fiction has to make sense, and despite what some comedians say, so does real life.
Science is a rigorous process of learning the rules our universe runs on. We need to be able to understand those rules and make predictions from them to find useful ways of doing things. Additionally, a robust science is one that has new, verifiable things to look for, to explain finer details or possible exceptions.
Pseudoscience, in contrast, is usually dead from the start: There's usually no explanation, and if there is, it contains no details or mechanisms to look for. Without that, there's no predictive power: The people who propose a pseudoscientific theory usually can't guess anything about what new tools will find. Take evolution versus Creationism: Biologists can use the theory of evolution to guess where they're likely to find a fossil, both geographically and what layer of rock it will turn up in. Biologists can predict how much genetic similarity two different species will have based on when their ancestors branched off each other. Creationism can't do anything like that. Instead, they can only sit back and attempt to claim evolution's predictions for themselves.