Can it be used in formal conversation/writing? What is the correct usage of phrase you don't know what you don't know? In the first sentence, it seems to me that to know expresses that the speaker experienced the problem/difficulty.
Using your example, knowing my rights means that i know i have. I know (about) this difficulty/problem. Also explain the difference between the two, thanks.
Possibly, i do know that can in fact only be used, when, you are answering the question of whether or not you know the issue at hand (or your knowledge has been called in. Alright, well, for example, like on saturdays, y’know, what i liked to do. It's not just you that don't know. In (2), however, the object of.
Please let me know as soon as you figure it out. For me, know implies knowledge of details or individual pieces, while am aware of implies a knowledge only of a whole. I saw this sentence in the book 1q84: Why would you have a problem with this?
'know of' is used when you have personal.