The Natural Philosopher wrote:

Then you should go for the $1m dollar prize from Randi. Post back and
let us know how you get on. Can I have 10% for letting you know about
it ?

Dowsing works,

It has never been proven that it does work. All tests attempting to
establish this have failed to reach this conclusion.

You could receive $1m by being the first to prove it. Why pass that up ?

but you can't prove you weren't cheating in a RANDI test.

eh ?