People really seem to get upset when the word, ignorance, is used in some form or another. I don't understand it; how does one resolve their ignorance on a subject, if they can't admit they are ignorant? Used ignorance on a moderated forum once and the moderator flagged it as mean spirited, when it was used in a reasoned context. "Some people might not like the inference that they are ignorant." If you want to increase your knowledge, then listen and debate; don't run and hide.