My question involves defamation in the state of: Tn, while was in rehab I had a neuropsychologist evaluation done and the guy gets the diagnosis wrong and has a horrible attitude during the interview phase of my neuropsychological evaluation. at a prior place I went back in 2012 they ruled out a diagnosis and he fails to even catch my ADHD. if I review him on a website, how would I block him from claiming defamation?assuming he would have to prove what I said was verifiably wrong?