In reply to cragtaff:
> (In reply to heathermeek) Any therapy works if the patient says it works. I have never homeopathy, but I know that many people do use it and they say it works. Lots of modern day medicine is only in use because the patient reports that it works, and that very often (but not always) is the only definitive evidence that is available or necessary.
That is a rather loose definition of 'works'. If a patient takes a medicine and then gets better it does not mean necessarily that the medicine was the cause of them getting better. David Hume worked this out a while back.
I've taken homeopathic remedies for various things - at the urging of pushy but misguided relatives - and the best I can say is that it didn't make things significantly worse.
I am deeply sceptical of the claims of homeopaths. That water can have a memory seems unlikely. At a molecular level water is a constantly shifting non-structure of weak hydrogen bonds that are strong enough to stop water becoming water vapour, but constantly break up and reform at temperatures between freezing and boiling. The constant breaking and reforming suggests that - in the absence of large scale structures that might somehow stabilise the bond and for which we have no evidence - it is not possible for water to have a memory.
I've met a few homeopaths in social settings and its interesting to see how and what they think about their own field of study. Chatting at one point to a friends landlord who runs a homeopathic clinic, he mentioned that he had been to a conference on alternative remedies. He had been particularly taken by a presentation on quarks and quantum thingummies. My training was in physics with a phd in particle physics so quantum thingummies is not a subject I'm unfamiliar with.
He was using the words I was familiar with but not the concepts. He used them the way that Star Trek uses them - to stitch together an interesting story just long enough for it to be told - but he wasn't, as far as I could tell, aware that he was talking utter balls.
He was genuinely interested to talk to someone who knew about this stuff, but he simply didn't have the framework to differentiate between the science fiction peddled - knowingly or unknowingly - at the conference and scientific fact. I like to think that our conversation made him think a little about what he was blithely telling people, but I suspect that unlike homeopathic remedies its repeated dilution by the opinions of the people he regularly spent time with gave it a rather fleeting half-life.
What he did have was a deep fund of success stories and - more surprisingly - failure stories. It doesn't work for everyone, was his take on it. Attributing the successes and failures correctly is where the difficulty lies. Is it chance, or do the medicines do something that a simple sugar pill wouldn't?
Contrary to what a few people upthread say, most people wouldn't change their opinion of homeopathy based on a single paper. If a paper was published stating that homeopathy did have a positive effect that was greater than placebo, it wouldn't change many minds. Most people would dismiss it, or find a bazillion flaws in it. This is easy to do with many scientific papers if your intent is purely to find flaws. By flaw here, I don' mean something fatal to the papers conclusion, but anything that might give a reasonable person pause from an unusually large number of typos to a tiny sample size.
For homeopathy to be considered proven I think a lot of people would like to see a experimental demonstration of water memory that persists for months, is capable of encoding a wide variety of pharmacologically active molecules, and produce their opposite effect in a patient, and survives the curious manufacturing process by which homeopathic remedies are produced as well as being swallowed with whatever a person happens to have eaten that day. None of this exists. They'd also like to see a replicable large scale study that shows homeopathy works. The largest metastudies on homeopathy in fact show that it has no positive effect above that of a placebo.