Mr. Draco Malfoy was called upon to identify us. I am entirely certain that Mr. Malfoy knew who we were - we had spent 6 years in each other's company at Hogwarts, in the same year. However, Mr. Malfoy kept repeating that he didn’t know whether it was us and that he wasn’t entirely sure. Let me be clear - the fact that he didn’t identify us - saved our lives and enabled us to escape the manor and regroup in order to complete our mission.