I do think that fairycake & OTManatee* make good points, the mind is a very powerful healing tool & if that is what the disbelievers see as placebo effect then I too am happy to go along with that & would take it a step further, we are creatures of mind, body & spirit & any true healing needs to take place on all levels.
I don't however think that seeing anyone who has a different understanding/belief system/experience to yourself as "Dummies" is a particularly intelligent open minded approach to ANYTHING
& in my experience "truly" intelligent people, are clever enough to keep an open mind 
I'm not however some airy fairy bimbo who believes anything I am told, or believe everyone who say's they can/are actually tells the truth - there ARE a lot of charlatans out there in all fields, & no doubt that includes Homeopathy too, I am what is probably best described as an open minded sceptic
but I've been lucky enough to travel widely, & have experienced a lot of things that are just NOT explainable by science alone, not yet with our understanding of science at least, & who's to say that EVERYTHING has to come under scientific rules to be real/factual anyway, maybe by placing that boundary on things we do ourselves no real favours at all??
Different subject, but one probably even more controversial for anyone with a closed mind & needing scientific proof in order to believe- REIKI
Many years ago, after a bad time personally, major busy at work & just plain stress, just too much going on I was persuaded to go away on a break with a friend, to one of these hippy dippy retreat places, it was mostly a pampering thing, with detox & a few therapies thrown in, most probably acceptable in scientific terms, such as yoga & though always happy to keep an open mind, I was very sceptical over some of it, you booked your chosen therapies the day before - lists put up of who & where & added your name
on one occasion I had a couple of hours to kill, & the ONLY therapy left was Rieki - I was very sceptical, but it wasn't going to cost me anything, so thought why not, it would at least be relaxing & kill time until lunch
Anyway, I went into the room & the therapist came out from behind the screen & introduced himself, I nearly choked trying not to laugh, he was this big burly & very northern "bloke" , the last type of person I would of expected to be doing something so flaky....I did not believe in ANY shape or form, that Reiki would work, & definitely didn't believe in this "Bloke"
I had 8 months earlier had an accident that damaged an ankle & left me on crutches for 3 months, I stubbornly worked through it, & as a result it didn;t heal well & I had constant pain in it
He did his thing - which turned out to be a hands off massage of my "chakras & aura"
- he hadn't asked any questions as regards what problems I had - stopped at my ankle & accurately diagnosed it as painful & damaged from a "trauma" ..he worked on it for a while, whilst I lay there trying really hard not to giggle as it was all just too daft - he then went on to stop over my kidneys, telling me I had a problem there too (news to me
he worked on that & finished up telling me to drink lots of water to flush the toxins he'd dislodged away
I headed back to my room to get ready for food - noticed I'd come up in a rash over my kidney - he hadn't warned me of this - I headed back to ask him & before I could say why i was there, he piped up, don't worry, the rash is normal
Months later I collapsed & was rushed into hospital, only to have them tell me that I had kidney damage on the same side as the Reiki guy had said
My ankle never hurt again either, in fact todate, dealing with other chronic pain problems, its probably the only bit of me that never hurts.
I was so impressed by this Guy & Reiki itself, scientifically proved or not - when I gave up work, I "trained" in it myself
after my "attunement" the very first (supervised) diagnostics & treatment I ever did on a complete stranger frightened the bloody life out of me
, so much so, bar little bits on myself & DD I have never used it again
What I experienced was so powerful, & so NOT of the scientific world that it shook me to my core, I accurately saw his problems in my mind & I FELT his problems as a handful of writhing snakes - they were there in my hands, so real it made me jump back & scream....with encouragement from my teacher I carried on, but was shaking like a leaf, as it wasn't anything like I had expected & speaking with the Guy afterwards - EVERYTHING I read in him was spot on - but the experience put me off for good
So yes no doubt that will sound like a load of old baloney to those of you who demand scientific proof of everything in order to believe & thats fine, I understand that, as its YOUR experience of life so far that has led you to need that - maybe that will change for you, maybe not -
but it doesn't make the rest of us dummies open to conmen
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just different life experiences that leave us more open to the idea that not everything needs to fall within scientific boundaries (as we currently know them) to be factual:)