Well, the symbol's still there. Though it could be an illusion now. Though some of that response seemed - suspiciously specific? - and she wouldn't need to do that if they were spoofing the spell by any number of magical means - but then she could be giving suspiciously narrow answers just to make him believe that - maybe it'd help if Keltham showed her that he is going to be reasonable in what kind of answers he expects?
"To the best of your knowledge and guesses where you do not know, is the Chelian government concealing any major facts from me not relating to its internal security measures, secrets meant to ensure my own safety or the safety of other people of Golarion from me, or knowledge that is intrinsically harmful or intrinsically vastly dangerous?"