If you are reasonably intelligent but lack information you're ignorant, and ignorance can be cured by education.

Someone with less intelligence than others isn't shamed; he or she still functions, and sometimes better than those more intelligent.

It's when you hold yourself out to be knowledgable but aren't, or when you are unwilling to learn, that I'd think you were stupid. And stupidity is the only crime for which Nature imposes a death penalty.