"lacking knowledge or awareness in general; uneducated or unsophisticated"
That's ignorant apparently. I am only lacking knowledge over one specific thing, not lacking of awareness or knowledge in general.
Also, if I then go and 'educate' myself by finding out more information on it, I cannot still be considered ignorant, just because no one on here is willing to accept that ALL adults everywhere couldn't have possible gone through life without knowing what 'final solution' means.
Maybe, that, is ignorant.