I would say that any prediction that predates accurately any event is valid, not matter the means.
But say for instance I had a dream a week to ten days before Fukushima earthquake/tsunami, which I did, is it valid? I would say for me it was indeed valid, but since I never mentioned it to anyone how could it valid to anyone else.
I know that last was a bit convoluted but see, the thing is all about perspective is it not?
Oh and BTW if Ron Pandolfi's prediction of a Sept 2016 ELE is correct, whomever is elected in November 2016 will be moot!