There are any number of videos of people who swear dowsing works, who swear that dowsing works for a given test environment, for which it indeed works ... until

There are any number of videos of people who swear dowsing works, who swear that dowsing works for a given test environment, for which it indeed works ... until they don't actually know where the water is. There's a famous series of such challenges as part of the $1 million dollar paranormal challenge - https://en.wikipedia.org/wiki/One_Million_Dollar_Paranormal_Challenge#Example_of_a_test_(dowsing) https://en.wikipedia.org/wiki/One_Million_Dollar_Paranormal_... Here's a (long) example video, from many years ago in Australia: https://youtu.be/cqoYrSd94kA?t=122 https://youtu.be/cqoYrSd94kA?t=122 . The test starts at https://youtu.be/cqoYrSd94kA?t=764 https://youtu.be/cqoYrSd94kA?t=764 . You'll see the 12 testees were confident that the test system was valid, and they would be correct. And after they failed (110 test runs with water, brass, and gold) - https://youtu.be/cqoYrSd94kA?t=1947 https://youtu.be/cqoYrSd94kA?t=1947 - they came up with rationalizations - https://youtu.be/cqoYrSd94kA?t=2242 https://youtu.be/cqoYrSd94kA?t=2242 - for why they failed - exactly as Randi predicted. Randi at https://youtu.be/cqoYrSd94kA?t=1030 https://youtu.be/cqoYrSd94kA?t=1030 says he did this to persuade people like you that dowsing doesn't work.