Just for fun.

[robvalue]

I'd argue that you can't "prove" anything. The most you can do is to demonstrate that a series of premises logically lead to a particular conclusion; that's the closest thing to a proof.

As has been said, science simply offers the best available models and explanations.

So to answer the question, no I certainly can't prove it exists! All I could hope would be to convince someone beyond reasonable doubt, and what is reasonable is going to be subjective.