Malfoy finally seemed to have struck a nerve with Harry, who had otherwise taken the news rather complacently.<br/>"I’m sorry, how is that at all obvious?" he snapped, his voice doing a worse job of containing his annoyance than intended. While Harry understood that the topic was by any definition unexplored, he felt increasingly frustrated by Malfoy’s blasé approach; especially if he evidently had more information to give, but apparently only so when he could correct Harry.<br/>Having no expectations of Malfoy actually answering, Harry took a moment to steep in his own annoyance, before inhaling an intent to contine in a more civil tone.<br/>"Let me ask again," he reiterated, voice tense but audibly with the effort he put into keeping the dialogue and tone professional. His eyes were on Malfoy, having lost any interest in egging information out of Malfoy, but wanting to be respectful despite it all. "What does it mean that my signature has changed? Not for your research, but in practice."