Secondly, what I put is just to clarify that the structure of Do you not ... is right, possible and formal. I said the structure. Can you not and Can't you have of course two different meanings but Do you not and Don't you have the same meaning.
!Obvious contradiction
since there is an aspect of difference between the two cases, it is inappropriate to bring one of them as an example for the other
?can you bring a more direct rule
I agree with what Dr.bashari said because we were taught so, and I am really interested in learning more; if you have a good piece of information about that, tell me without hesitation
thanks a lot