President Donald Trump has repeatedly pointed to a dementia screening exam to counter questions about his intelligence, but medical experts say the test is not designed to measure what he claims. Speaking at the White House Small Business Summit on May 4, Trump said he uses the cognitive test as a defense when critics question his mental abilities. "Whenever I hear that one, I say, 'Let's take a cognitive test,'" Trump told attendees, referring to being called a "total moron" or "so stupid." He added, "I've taken three. No president, think of this, has ever taken one.