adjective
1. lacking in knowledge or training; unlearned: an ignorant man.
2. lacking knowledge or information as to a particular subject or fact: ignorant of quantum physics.
3. uninformed; unaware.
4. due to or showing lack of knowledge or training: an ignorant statement.
I didn't hurl an insult, I merely stated a fact
You really are very limited.
Stop pestering now; I'll bet your Mom finds that an annoying trait of yours.
Why don't you yell upstairs and ask her?