He used the term with affection, since obviously he was counted in that number.
David nodded as he read. While he had grown up with two parents, there was only one that he actually belonged to, so in a way he got that. A few from the project were like him in the sense that one or both of the parents they had known weten't actually theirs. Except that her one parent was dead. She was nonchalant enough about it that he didn't feel too sorry.
Still, the timeline dictated that he probably at least knew of her. And he was curious now. He wanted to place some features in her face. Some mannerisms that belonged to someone else. 'Who was she?' He wrote, and then passed it to her.