I refer to this question: Insult for someone who “doesn't know anything”?
I VTC'd on the basis of Unclear What You are Asking, because I didn't find any context. Is the person to be insulted lazy, or dyslexic, or all thumbs with anything mechanical but a genius in the most abstruse mathematics, or disabled, or a dreamer? Is this for a story the OP is writing? the OP says
someone who doesn't know anything (meaning not the simplest/basic or obvious things)?
but I doubt that he has tested this person in all fields of human knowledge.
I feel uncomfortable with this question, partly because it is a flawed question, but mainly because it could be a mean question, although that is not clear.
There is a five-year-old question about how we should deal with questions asking how to insult people, which did not come to much of a conclusion.
But, what we can do is VTC such a question that is flawed for standard reasons.
I have recast my question so it is not a duplicate of the earlier question.