Chiyo was quiet for several moments because she was busy processing information she didn't have. Though the answer given would make a reasonable bit of sense as to why she got along with various people in the First Generation, and why all of them occasionally looked at her strangely, they were probably subject to nostalgic thoughts concerning their Water Queen. Beyond this it was noted that Shoichi was her run partner which was true, and beyond that that people who were Brain Chargers seemed to experience it like amnesia, with that in mind... Kurama's sentence trailed off and Chiyo filled in. "You're implying that if he was actively using his, he wouldn't really notice or remember mine. That's amusing." she looked at him and narrowed her eyes. "That, makes sense... but it still strange." she shrugged it off. If she continued to think about it, it would only make her angry. The evidence pointed towards the correctness of this man's statements and even if she had no evidence of her own she'd take his word. And the more she thought about the early modifications to her ATs and her brother's meddling the more it made sense that he'd done such things, mostly because she didn't imagine that her brother and the Water Queen got along. Beyond this point, if she really needed to gain confirmation she could always just ask Mukuro, as their observant Tar King would probably be able to confirm or deny this information, likely while being snarky about it.