"I Know"

I HATE the majority of kids between age 8 and 14. Why you ask?
... because apparently they don't know any other combination of words other than, "I Know" (in that sequence).
What-The-"F" DO YOU KNOW, REALLY. (does a rhetorical question require a question mark? I Don't Know. Someone help me out.)
Just because you have the intellectual capacity to know when your birthday is now, doesn't mean you know everything.