"The idea that <9% of the general population at death have degenerative brain disease is highly implausible. " If you consider dementia explicitly, than the epi

"The idea that <9% of the general population at death have degenerative brain disease is highly implausible. " If you consider dementia explicitly, than the epidemiology suggests a potential rate as high as 20-40% - which is much higher than the lowest possible CTE rate. (In fact, it's possible that all CTEs diagnosed in this report would be classified as purely dementia in the general population).