He can indeed hear through both pairs, and in his own world there are indeed humans who have only one type of ear or the other. Młynar is, however, coming to the conclusion that if he continues to acknowledge this line of inquiry it will not stop. He did not come here to have an...eccentric ask him biology questions.

So he sticks to answering the last question. "To the best of my knowledge, those symbols have nothing to do with ears."