I don't know i'm Thuli
You shout this when you're confused and you're too proud to ask. It's like being a dog who won't leave the room even though the door is open.
"I don't know I'm Thuli!" he said when he didn't know the answer to the question.
"I don't know I'm Thuli!" she yelled when she didn't know how to solve the equation.
"I don't know I'm Thuli!" he blurted out when he couldn't figure out the riddle.