"Your own personal testimony is something that cannot be disputed."
But also can't be confirmed or verified by the person experiencing it. There is also no reason for anyone else to believe it was anything more than a hallucination. We know the human mind is susceptible to seeing things that aren't there.
Absolutely. People receive enlightenment in a variety of ways. Some like @rok-sivante had his eyes opened by an ayuwasca experience.
It is our freedom to share and others freedom to accept or reject what we may tell them. But even a dream can open someone's eyes and change their life.
Everything can't be proven, but some things that cannot are commonly accepted. I believe we should question everything along with our experiences and come to our own conclusion.
"Everything can't be proven" Can you prove that? ;)