Trump Reveals the Insult He Hates Most and What He Did to Try and Stop It Donald Trump's decision to undergo a cognitive test, following weeks of criticism over his mental acuity, is a telling example of how he responds to perceived slights.
His aversion to being called "dumb" is nothing new; we've seen this before in his public feuds and Twitter tirades against anyone who dares question his intelligence or competence.
The cognitive assessment Trump opted for is the Montreal Cognitive Assessment (MoCA), a test designed to detect early signs of dementia and other cognitive impairments.