Not That I Am Aware Of

Isn't it that I know or don't know anything? 3

what is the difference?

Thanks !!

Very much the same thing, with minimal differences in meaning and application.

It's not that I know about it = I don't know anything about the question.

I don't know anything = I don't know of any articles (examples) that match your question.

The former applies universally, the latter only when there is much to consider. You cannot achieve this without selecting one or more. The term no is a numerical term.

Is the train late today? Not that I know.

A panzer fell off the platform? .. I know nothing.

I think if you are asking about an event that cannot be counted, use no. And if the question has anything to do with numbers, we don't use any.

Johnny graduated from college. ..no...........................

Have you taken any of your courses? .. No one .............................................. .... ..............

Not what I know, usually about one (one) thing. So if someone asks if Joey left his shirt here? You are talking about shirts. You wouldn't say I know.

I know that none of them deal with PLURAL (DUAL) things in general. So if someone asks if Joey left his book here? You are talking about more than one book. Would you say I don't know anyone?

Help for example!

Not That I Am Aware Of

The first one is an answer, right? Write the question. The second answer is that you know a lot? Write the question.
Both are grammatically incorrect in their suggestive positions, although unfortunately, hardly anyone today knows what they mean!