Hi. I am new to this site. I was researching GMO's and found a good discussion here.
Then I saw the challenge and read (skimmed) the dowsing exchange.
Many years ago, I knew some-one in South Africa who made his living from dowsing. He used rods and/or maps. I think his use of maps precludes having some sort of animal-like ultra-sense (which I have seen examples of, and some dowsers may use this).
He was paid by corporations and individuals to find not only water but minerals including gold. He made a good income, but I asked why he was not a whole lot richer. This was when I learned about the "abuse and lose rule". Such gifts are not "law of physics" but are moderated by a higher power. This gives skeptics (I am part skeptic) logical reason to shout "Cop-out".
A test was designed. Dig multiple holes and fill them in. Put gold jewellery in a cloth in one hole. He could not find the gold. His genuine puzzlement gave me my first lesson (of many) of the "no test rule". Another "cop-out", but it means the prize is 100% safe, unless the higher power decides to surprize you.
I needed to drill for water on a farm. The drillers claimed that geological survey and dowsing had about the same success rate of 80%.
I tried the rods where water had been predicted. It seemed to work - the rods moved at the same spot repeatedly. I don't think there is a "spook" force moving the rods. An extremely slight tilt of one's hands causes the rods to move. The rods are thin and slippery, and while I could make them swing if I wished, I could not sense my hands tilting when doing the dowsing.
I am an engineer and researcher, and have come across many claims. I find I can debunk most by just asking the right questions, and seeing the people back off. This must be done in a gentle, genuine interest manner, otherwise they go into "shields up" mode.
All of my psychic experiences occur when I least expect them. My guard is down, and my skeptical nature is at rest. My mood is one of idle curiosity mostly, and a spontaneous test will work. But only once, as if to prove to me personally that certain things work.
Because of "personal proof/evidence" I lean toward acceptance of a higher power, and of psychic phenomena. Certain "intuitions" have been a great help at times. At one stage I was a complete atheist, and for many years an agnostic.
Unfortunately my experiences fall into the category of anecdotes. These can be debunked by claiming a number of theories. Coincidence, liar, self-deception, self-delusion, hallucination, tricks of the mind, and so on. I would doubt my own sanity, except that there were often others involved who would confirm to me what happened.