Not familiar with the term, I googled to find this:
The hallmark of encephalopathy is an altered mental state. Depending on the type and severity of encephalopathy, common neurological symptoms are progressive loss of memory and cognitive ability, subtle personality changes, inability to concentrate, lethargy, and progressive loss of consciousness.
Just what we need in our nation's leader. The take (from the NYPost article you linked in the other thread) that Trump coming down with the illness is a testament to his heroism and selfless devotion to his duties is all the more wrong in light of these kinds of findings.