I stumbled upon this thread after becoming intrigued with the million dollar challenge, which I had never heard of before last night.
I know little about dowsing, specifically. However, I hope you don't mind indulging a newcomer in expressing some thoughts on the general topic:
I implore the skeptic to remain open to the possibility that a display of paranormal ability may very well be inhibited by the artificial constructs of an experiment. As an analogy, I may have trained my dog to consistently "fetch" on command in my yard, but the moment I try to demonstrate his ability to an audience at the local dog park, he fails to do so. This is not because he can't do it, but because the conditions have changed.
It could be argued that, with practice in the dog park environment, he should eventually be able to fetch on command. But perhaps there is something at the dog park location that will always inhibit him from fetching, like another alpha dog that has a tendency to nip at any dog who tries to run after a ball. Perhaps no one even realizes that this is why my dog won't fetch because the influence of the alpha is subtle (it's been demonstrated that dogs pick up on energy from other dogs, an energy that most people will not pick up on. Also, dog's develop strong associations. My dog may have once been nipped by the alpha in a unseen event while trying to retrieve a ball and has consequently learned his lesson and will never try to retrieve a ball in front of the alpha again). Let's also not forgot state-dependent and context-dependent learning.
My point is that we may not always be aware of the subtle effects of the controlled elements of an experiment. It could be the design of the experiment that's the problem. The rub is teasing out experimental design flaw from the power of a human to rationalize in order to uphold a delusion. I noticed that some MDC protocols were rejected because they were so complicated, but perhaps the individual being tested was trying to design a situation that's as real-world as possible. But with this, we begin to enter the realm of a natural experimental design, which I'm assuming would not uphold to the strict standards of the MDC. But hey, it's a
million dollars... I wouldn't expect any less.
Some specific points I'd like to make:
Your attempted explanation for what you are detecting - disturbance of soil by man (pipes etc) or water flow - has a number of potential logic holes: why are you not constantly detecting where the soil has been disturbed by tree / plant roots, insects or other creatures tunnelling (you'll be hard pushed to find an area of ground the worms haven't been through!)
Devil's Advocate: "
Perhaps because animal and insect tunnels, tree and plant roots, etc. are part of what makes up baseline, undisturbed soil"
You see - there's the problem. Holes measuring one cubic meter? Why? Why can't you perform this test with holes measuring one cubic foot? It sure would save a lot of time and money. Have you actually tried the test with holes smaller than one cubic meter? Have you actually tried the test with holes exactly one cubic meter in volume? If not why not?
I wonder this myself. How exactly was the 1 cubic meter length and depth determined? For example, DD mentioned that he was able to detect gas and electric lines, but from what I found on info about UK gas lines, the minimum depth of a mainline must be 750 mm in a road or verge and 600 mm in a footpath while the depth of a service pipe is minimally 375 mm in private ground and 450 mm in footpaths and highways. Already, we've saved some digging time.
I'll reiterate what many others here have stressed. An experiment fraught with potential design complication/expense should be subject to running one or more pilot tests to further refine said design. Coming up with protocol stipulations that seem to come out of thin air is not sound experimental design.
That's why I think Pixel42's suggestion of finding a local skeptics in the pub group is a good idea. The younger members of the group might be convinced to do some digging and the older members of the group can be blinded to all the digging and placement of targets, but they can be there to supervise the test while the diggers are out of sight.
I don't even think DD is ready for
that step yet. It wouldn't hurt to start with a few friends to pretest various aspects of the protocol before even enlisting a group of strangers to put time and energy into the small-scale version of the experiment. Why not first test his own limits by digging several areas of various depth and width to further hone in on an elegant experimental design? Sure, the results would be subject to interpretation limitations as the pretests would probably not be double-blind, but the information gained would be helpful as part of a documented, information-gathering phase of the experiment.
My concern is that many of DD's claims were not objectively validated. Reasoned responses as to why he was getting a "hit" or "miss" in areas that he would have thought otherwise (e.g. "I rationalized..." "Probably the remains of....") does not constitute valid proof. While I'm not saying DD's claims are false, it raises more questions than answers that should be further explored before jumping the gun on creating such an expensive experimental protocol. The human mind's ability to rationalize, reconstruct a memory, delude, etc. is
powerful. DD, if you are truly pursuing the MDC in the name of science, I urge you to do so with upmost prudence. Keep
your mind open to the possibility that this
could all be in your head by truly testing its limitations.
