Trump keeps boasting about passing a cognitive test - but it doesn't mean what he thinks it does - The Washington Post

As President Trump and his team began attacking former vice president Joe Biden’s mental and physical fitness this summer, Trump began pondering his own cognitive abilities....
https://www.washingtonpost.com/politics/trump-bragging-cognitive-test-dementia/2020/07/22/6578e826-cb65-11ea-91f1-28aca4d833a0_story.html