While talking to my daughter yesterday, I challenged her that she cannot get ready in 10 minutes. We were, actually, going out. She's keen in learning English, and she surprises me with either her answers or her questions!
Now the general case:
We emphasize our confidence by putting do (verb) as in...
You don't see that ~ Ah, I do see!
You don't care ~ I do care!
But, the conversation went like:
Rhyme, leave it! You cannot get ready in 10 minutes
Dad, I do can!
Now, grammatically, it could be plain wrong. I know this. But, my question is by any chance, even in an informal language ...is it correct?