The inability to apply logic while retrieving or processing information.
Being extremely
gullible in an unforeseeable way only observable in the US to such extent.
When an individual, a crowd or any other recipient/receiver of information will believe absolutely everything
when the information fits in their belief system,
when they see their world view and therefore themselves confirmed.
When someone believes in crazy, obviously in the most exaggerated way possible made-up lies
reaching a maximum level of impossible insanity
which you were sure about that neither a 4h-grader nor mentally ill
people would believe in.
Rather than believing experts who have studied their subjects for decades, Trump-Level-Stupid
people tend to believe any
moron on FoxTV who just found out about how to spell the concerned subject.
Those
people are the embodiment of the Dunning-Kruger-Effect.
That's why Trump-Level-Stupid
people are mostly lost.
Sometimes there are spontaneously healed and enlightened individuals. But these cases are miracles.
There are at least 70 million trump-level-stupid
people in the US who even believe globally well-known professional liars like Tucker Carlson, Sean Hannity and their King-Of-Lies
Donald Trump.
Meanwhile, it's easily observable in speeches of
Republican politicians that they feel the necessity also to take care of trump-level-stupid voters as an own distinct demographic who has a higher growth rate than any other one.