knb comments on Open Thread, Jul. 20 - Jul. 26, 2015 - Less Wrong Discussion
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No, by definition. Snake oil is defined as "does not work."
But there are examples of denigrated alternative treatments that actually worked to some extent: acupuncture, meditation, aromatherapy etc. Low-carb diets were denigrated for a long time but they've been shown to work at least as well as other diets. Fecal transplants have a long, weird history as an alternative therapy, including things like Bedouins eating camel feces to combat certain infections. The FDA was for a long time very restrictive and skeptical about fecal transplants in spite of lots of positive evidence of their efficacy in certain infections.
A pretty good heuristic, but it's worthwhile to have some open-minded people who investigate these things.
Thanks for the examples:
None of these seem to fulfill 3. They seem to fall into the category of somewhat decent with lots of exaggerated claims and enthusiastic followers.
Fecal transplants are a great example, although wikipedia says that most historical fecal therapies were consumed, and I don't know if those work (doubt it). Also it doesn't really fulfill 2 - it was doctors that first pioneered it when it was a weird fringe treatment. And thinking something is weird/extreme and fringe is different than thinking its a crackpot idea. But still a good example.