What is the difference between stupidity and ignorance?

Stupidity is when 당신 are unintelligent, while with ignorance 당신 may 또는 may not be very smart but 당신 just aren't very good at using your knowledge correctly.

Ignorance: when 당신 simply don't know something, but 당신 probably could learn it. A new person in train for example.

Stupidity: when 당신 don't know something and probably can't learn it.

Ignorance is lack of knowledge.
Stupidity is lack of intelligence 또는 common sense.
An intelligent person can be ignorant, and a stupid person can be knowledgeable.

stupidity means 당신 have some knowledge but not a lot. Kinda like Dumb. But 당신 can be Albert Einstein and not use your knowledge correctly 또는 with any sense. that is being ignorant. :)