I know what is the meaning of this.
I know what the meaning of this is.
If the first sentence is considered correct, can someone please explain the reasoning?
Edit:
The answer of the "Changing Subject and Verb" post illustrates my question, not the answer. Another example:
To know whether you are dealing with the main clause or an embedded clause, you have to think about what is the main verb of the whole sentence.
Compared to:
To know whether you are dealing with the main clause or an embedded clause, you have to think about what the main verb of the whole sentence is.