A friend of mine, who many years ago used to be a nurse caring for dementia patients, has impressed a very important point on me in recent months: Dementia just keeps getting worse. It never gets better.
It seems the United States has now had two presidents in a row around whom stories of diminished capacity and dementia have proliferated. Recently, a contributor to The Hill wrote about President Donald Trump's confabulation regarding his uncle John Trump, long deceased and formerly a professor at the Massachusetts Institute of Technology.
Now it's important to know the meaning of confabulation to understand this anecdote, so here's the dictionary definition: "the replacement of a gap in a person's memory by a falsification that they believe to be true." The author of the piece in The Hill believes Trump was simply relating something Trump believed to be true from his direct experience.