Stubborn Ignorance is not a lack of knowledge, but an unwillingness to accept any new knowledge, an unwillingness to grow in knowledge. One can feel that they already know everything, and be unwilling to admit that someone else might know something useful. One might also be unwilling to admit that certain knowledge is incorrect. Wisdom is necessary to perceive when there is knowledge that is valuable and necessary to learn, despite the changes that might occur as a result.