amathia
1. the state of ignorance created by the refusal see, acknowledge, or learn something which is necessary for understanding.
2. a righteous or hardheaded mentality resulting from the repeated unwillingness to hear or imagine another's perspective.
3. a lack of understanding with the ability to understand.
4. willful ignorance.
5. intelligent stupidity.
His defensiveness stems from his lifelong amathia.
Her amathia makes her unfit to participate in this debate.