“Ignorance is curable, stupid is forever.”
“Ignorance is the world's most curable affliction.”
“Stupid is forever, ignorance can be fixed.”
“Youth ages, immaturity is outgrown, ignorance can be educated, and drunkenness sobered, but stupid lasts forever.”
“He was ignorant, but a lot of people mistook ignorance for stupidity, and knowingness for intelligence.”
“Ignorance is not stupidity, but it might as well be. And I do not like feeling stupid.”