I don’t know how much of what said here about Randi is true, but if his test is actually to find a “dry” spot and then he says 94% of the planet is wet, the man is very suspect.
I think it should be fairly easy to prove or disprove whether or not divining rods work.
Firstly, you’d have to find someone that has NEVER heard of the system before. If need be we could look for someone who is mentally challenged, because anectdotally dowsing is so well known probably almost everyone has heard of it.
Anyways, we take this person who meets our criteria, and set him up to start dowsing.
We just explain how the stick/metal et al is to be held, we do not explain that he is looking for anything, and we don’t explain that he should even notice any change in his rod.
When send him out over a field where we KNOW for a fact water/a line is, and if the rod responds them I’m pretty sure we’ll have to accept that the system works.
Because with this test we have a person who has no understanding of dowsing, no expectations, and therefor it is ludicrous to assume they would be subconsciously doing anything or recognizing anything.
To me it would be a lot more legitimate than a test with criteria set up by a man who stands to lose $1m if he’s wrong, and a lot of face.
I don’t even think we have to go this far and acquire the aid of a mental patient/mentally handicapped person.
We could just ask geologists if there are clear cut signs on the surface of a parcel of land, say a parcel of land comprised of a few dozen acres, that make it obvious or even apparent that water suitable for drilling a well to is under that spot.
We’d have to ask the geologists if there are a) signs, and b) signs that one can notice even if the person has no familiarity with the geography in the region as a whole.
I think the real question is, before we start assuming that people are just subconsciously noticing geologic signs, ARE there in fact geologic signs that you can notice in a very restricted area of land without ANY knowledge of the directly surrounding areas? These geologic signs we think people are just picking up on may in fact not exist, I don’t know, I’m not a geologist.
Furthermore, I’ve taken enough geology classes in my life to know that in most cases not even the most trained professional geologist can look at a back yard and plot for you exactly where a given utility line runs. Utility lines wouldn’t leave geologic signs like water wells.