In Clarence Thomas's first term, he rarely asked questions at oral arguments, and avoided writing decisions or dissents because he respected the elder Justices's superior experience. From this ignorance of Thomas's character, people called him stupid.
He has proven that wrong in the fullness of time.
"Better to remain silent and considered an idiot, than to open your mouth and remove all doubt." Jackson failed this critical test by removing all doubt that she is, in fact, a DEI moron.