It is because the chance of the right answer goes down exponentially as the complexity of what is being asked goes up. Asking a simpler question is not voodoo.

It is because the chance of the right answer goes down exponentially as the complexity of what is being asked goes up. Asking a simpler question is not voodoo. On the other hand, I think many people are trying various rain dances and believing it was a specific dance that was the cause when it happened to rain.