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Dowsing by a Skeptic

If it interests you, sure.

I am not against adopting heuristics to shape how I spend my time, but neither would I accept the point of view that "most," or "nearly all," or "with a very high probability," or "every one I've checked so far," could ever substitute for "certain."
Does this mean that you wouldn't try to stop someone from jumping off a bridge? They might be able to fly, or their guardian angel might save them.
 
"Since science doesn't know everything this woo could be true."


It's even worse than that. More like: "If this thing I think is woo isn't, science has to yield."

Remember, we don't want to win so much as end up closer to correct than we were before. But I do agree that skipping the trial altogether, and going from the squad car right to prison is more efficient.
 
It's even worse than that. More like: "If this thing I think is woo isn't, science has to yield."

Remember, we don't want to win so much as end up closer to correct than we were before. But I do agree that skipping the trial altogether, and going from the squad car right to prison is more efficient.
I (and, I think, tsig and PixyMisa) agree, WHEN the hi-lighted part is true. Dowsing isn't there yet, and everything we know about physics says that it won't be.

Let's get the horse harnessed before we get into the cart.
 
I asked the rods out loud to show me the water line and they pointed in the opposite direction to what he had indicated. I found the water line. It then occurred to me that I was being tested, and asked him if that was the case. He begrudgingly admitted it was.
If I read this correctly, you are claiming the rods can actually hear your voice. Is that your claim?


FFS AdMan, I am only just beginning to experiment with dowsing, I am far from the stage of scientifically trying to prove anything. Gimme a bleedin chance for christs sake.
In your very first post in this thread, you claimed to be a long time skeptic. If that is so, then you most certainly know about testing protocols, blinding of tests, null hypothesis, etc. With that knowledge, you don't need a bleedin chance to start testing - you would have done so at the first inkling of a dowsing capability.

Why have you failed to do so?
 
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I had a very interesting day today. I went to see a long time friend who was interested to see the dowsing we had talked over the phone. I showed him what I could do, then he took over. He can locate all the stuff that I can, AND he can do the remote dowsing too ! It was crazy to watch his rods swing backwards and forwards as I hoped to and fro over a telephone line.

Later on we drew a map of the interior of his house with the idea of doing a test. He went into his office and shut the door while I located two points that gave me a water reading. I marked the two places on the map with an X. He then took the rods and also located two places, placing a cup at each one.

His locating matched mine exactly:)
 
If I read this correctly, you are claiming the rods can actually hear your voice. Is that your claim?
:D No! :D



IIn your very first post in this thread, you claimed to be a long time skeptic. If that is so, then you most certainly know about testing protocols, blinding of tests, null hypothesis, etc. With that knowledge, you don't need a bleedin chance to start testing - you would have done so at the first inkling of a dowsing capability.

Why have you failed to do so?

I know sod all about "testing protocols, blinding of tests, null hypothesis, etc" I don't even know what null hypothesis means. What does it mean ?
 
I had a very interesting day today. I went to see a long time friend who was interested to see the dowsing we had talked over the phone. I showed him what I could do, then he took over. He can locate all the stuff that I can, AND he can do the remote dowsing too ! It was crazy to watch his rods swing backwards and forwards as I hoped to and fro over a telephone line.


Do you understand that nothing in this story is different than if your friend were controlling the rods with small hand movements?


Later on we drew a map of the interior of his house with the idea of doing a test. He went into his office and shut the door while I located two points that gave me a water reading. I marked the two places on the map with an X. He then took the rods and also located two places, placing a cup at each one.


Seriously? He found water in his own house? How in the world is that supposed to convincer anyone of anything, least of all him or you?


I know sod all about "testing protocols, blinding of tests, null hypothesis, etc"


Several people here have guided you to threads and videos where good testing protocols can be found. I, myself, have twice posted very simple tests you could do in about fifteen minutes. If you know "sod all," then the resources are there to help you. If you don't care to know, then nothing anyone says will matter.

I find it interesting that you keep coming back with fresh (and more and more ridiculous) anecdotes rather than performing one of many simple tests.


I don't even know what null hypothesis means. What does it mean ?


The null hypothesis means that there is no reason to believe something without appropriate evidence. Since you have offered no evidence that your dowsing power in any way finds things you don't already know to be true, then there is no reason to believe dowsing is anything other than imaginary.
 
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His locating matched mine exactly:)


In other words, you've yet again demonstrated the ideomotor effect.

Are you unable to come up with a proper scientific test? Ask here if you need help.
 
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You have been told how to do a simple blinded test. Until you do so and get a better than chance result the null hypothesis - that your perception that dowsing works is due to the usual combination of the ideomotor effect, confirmation bias etc - stands. Why on earth did you waste your time in the way you did when you and your friend could easily have done a simple test that would have been genuinely meaningful?

Incidentally if you were present when your friend did his dowsing and placed his cups then the fact that he put them in the same places you did is not even slightly surprisingly, as you'd know if you had bothered to take advantage of a single one of the opportunities to educate yourself you have been given since you started this thread.
 
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The OP hasn't come here to learn anything - his mind is made up.

What he wants is affirmation. Good luck with that....

I've gone prospecting with people who have claimed dowsing works. None of them are rich and none of them have found anything more that what anybody else had done with a rudimentary knowledge of geology and mineral deposition principles.

My lucky underpants were the counter-dowsing ploy. Every time I found something I attributed it to my lucky underpants, which proved that they were lucky.
 
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[ . . . ]
Why not do a very simple experiment today? Have your wife put six empty glasses under some towels or boxes. Let her roll a die and fill the corresponding glass with water. See how often you can find it. It should take about fifteen minutes.

However new you are to dowsing, I'm sure you have six glasses, some towels and fifteen minutes.

Test yourself and report the results.

Thanks for a quick and simple test to propose to people who claim to be water witches.



You'll need to watch this lecture by physicist and skeptic Sean Carroll. It's a better explanation than I can provide.


[ . . . ]

Thanks for that video.
I think the part that best explains why dowsing, homeopathy, life after death and other woo is pure and simple jive comes from 35' to the end of the lecture.
 
No, it's not. Since we only have to consider possible explanations, and there aren't any, it's quite easy.

Here's where we disagree.

I'll even advance a possible explanation: dowsers are reacting to something they smell.

1) Smell is variable across the population and so you wouldn't expect the same performance from different people.
2) Smell can act below the level of conscious awareness.
3) The item found doesn't have to have a smell, it can be an odor associated with the item.
4) Smells vary in intensity depending on conditions so dowsing performance might also vary.
5) Artificial setups to test dowsing wouldn't necessarily duplicate the "wild type" smells.
6) When the smell influence isn't available, a dowser falls back on instinct and produces random results.

So, is this possibility ruled out by QFT? I don't see why it would be. Is it worth testing, since you've stated that there aren't any possible explanations? Does what I have outlined get tossed out because it doesn't fit the definition of dowsing?

While I agree that explanations of a certain type are ruled out, I think your claim of no possible explanation is too broad.
 
Here's where we disagree.

I'll even advance a possible explanation: dowsers are reacting to something they smell.
So what you're saying is that dowsing isn't real, but dowsers think it's real because they're smelling something?

That doesn't dispute my point, which is that we know for sure that dowsing is baloney. It just offers an explanation for why dowsers might show better results than we'd expect by chance, and mistakenly attribute it to dowsing.

Except - there is no evidence that dowsers have better results than we'd expect by chance. So it's a whole chain of supposition to explain something that doesn't happen.
 
So what you're saying is that dowsing isn't real, but dowsers think it's real because they're smelling something?

That doesn't dispute my point, which is that we know for sure that dowsing is baloney. It just offers an explanation for why dowsers might show better results than we'd expect by chance, and mistakenly attribute it to dowsing.

Except - there is no evidence that dowsers have better results than we'd expect by chance. So it's a whole chain of supposition to explain something that doesn't happen.

OK, I see the mismatch better now. We are starting at two different places. I'm starting with an activity people do as I observe them doing it, while I think you are starting from what might be claimed about that activity.

Of course, if the root concept - whatever qualifies for the term dowsing - is bollocks from the start, there can, by definition, never be evidence for it since it is impossible right out of the gate. Anything possible wouldn't be dowsing. Dowsing doesn't exist.

I just don't find that as interesting as examining what people actually believe and what they do. In fact, I wouldn't require them to advance any theory at all, just show me what they do when they say they are dowsing. So my interest is in explaining what's going on, rather than dismissing the whole thing as impossible by definition. I enjoy telling them were the trick lies and, with luck, getting them to see it as well.
 
I'll even advance a possible explanation: dowsers are reacting to something they smell.
If this were true, we'd have gold sniffing dogs.

I think this may have been suggested in a previous thread about dowsing for corpses.
We have corpse sniffing dogs.

OK, I see the mismatch better now. We are starting at two different places. I'm starting with an activity people do as I observe them doing it, while I think you are starting from what might be claimed about that activity.

Of course, if the root concept - whatever qualifies for the term dowsing - is bollocks from the start, there can, by definition, never be evidence for it since it is impossible right out of the gate. Anything possible wouldn't be dowsing. Dowsing doesn't exist...
By Jove, I think he's got it!
 

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