- I feel like a loser and I’m trying to cover it up.
- I don’t want to say the wrong thing.
- I’m embarrassed by being a failure.
- If I could answer to your satisfaction, I would.
- My mind is (actually) blank.
This is why ADHD kids say “I don’t know” so often.
It has little to do with defiance and a lot to do with self-esteem and/or not being able to access information in a timely manner.