Proof is no more than demonstrating the complience with a grammar system.
Evidence is providing an environment.
In neither one of these can anyone controll anothers ability to comply with principles of grammar or abstract from an environmental source.

One can put a math book in front of a tree, but it will not learn to read.

If telepathy exists, and I am sure it does, no amount of words or standing in front of someone will make them telepathic enough to understand.

It is not these unique things that are of importance to someone who can never participate in the experience. A man can live among the apes, but an ape cannot live among men.