But she has all the resources at her disposal. Where could she not go, how could she not find him?
In what hiding place could he not hear her calling out to him? She can be as loud as earthquakes and thunder, when he did not respond would she not call more loudly?
And surely she could say things, remind him of things, that only she could know. He might think she does not love him, but he could not pretend to himself that it was not her and that she did not come looking for him.
Besides, she is brilliant beyond measure. How could she not puncture the lies the kidnapper fed him? Perhaps he (or the kidnapper) tells himself that he just imagined it was his mother. Could she not offer information that the child would not have known as evidence that it was not possibly his own imagination?
Even so, what happens in the case where he goes out each day looking for her in return and calling out to her. Is there someplace he could be where she would not be able to hear him? Would she not shout back to him in the voice like the earthquakes and thunder?
How can we say he is trapped if he is going out looking for her and calling to her? Are we back to the defense that he must just be doing it wrong in spite of his best efforts and intentions?