On the nature of evidence.

[Jenny A]

I have certain knowledge that there is invisible purple nothing in my basement. It does not exist in any dimension we can perceive. It does not affect the dimensions we can perceive in any testable or predictable way. Nothing it does cannot be explained by things that naturally occur which we can detect.

I know this invisible purple nothing exists because I've opened my mind and heart to it and I feel very much that knowledge of it's existence makes my life meaningful. And yes I'm really certain that though it is invisible, it is purple.

What evidence would the OP accept to prove it exists or doesn't exist?

So? Answer your own question already.