How do you know if you have CTE?

I know that they can’t tell if you have CTE living until they test for the pathology but I do think that since we know more of the symptoms, doctors can pre-diagnose now more than before. It makes me incredibly sad that Grant spent his whole life and our marriage as misunderstood. Even though he was an alcoholic, he was a brain damaged addict. I never knew what drove him to that.