Is this a correct explanation for question-answering?

 Is this a correct explanation for question-answering?

Theory - Grammar and thinking.

Suppose someone tells you that A gave a ball to B. Then he asks you - A ball was given by whom? You then answer - A. How does this get processed?

Here is an explanation. You convert the question and the data into different grammatical (but obviously, Semantically equivalent) forms. When the forms match literally, the answer clicks. 

That is, the given data 'A gave a ball to B' becomes ‘A is the giver of the ball’. The question ‘A ball was given by whom?’ becomes ‘Who gave a ball?’, which becomes ‘Who is the giver?’

Now, you have the question as - ‘Who is the giver?’ - and the given data as ‘A is the giver’. These 2 match exactly for grammatical slots. There is an ‘A’ for the corresponding position of ‘Who’. Hence the answer is - A.