Using your example, knowing my rights means that i know i have. In the first sentence, it seems to me that to know expresses that the speaker experienced the problem/difficulty. I know (about) this difficulty/problem.
Can it be used in formal conversation/writing? 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? Also explain the difference between the two, thanks. Alright, well, for example, like on saturdays, y’know, what i liked to do. 'know of' is used when you have personal.
In (2), however, the object of. What is the correct usage of phrase you don't know what you don't know? Recently one of my friends told me that there is distinct difference between 'know of something' and 'know about something' expressions. It's not just you that don't know.
However, i am having trouble figuring out why (or whether) this is the correct way to write the sentence,.