There was a hard silence in the suit. When Cortana finally spoke up, she tried to hide the crack in her voice. "Chief, I don't remember any of this."

Which, for an AI that was already falling apart, didn't bode well for her mental state. There was some explanation, but she almost didn't want to have to admit it.

"It's possible something got corrupted and I lost the time between Requiem and the shuttle. That would explain the gap." Of course that plausibility was far from an ideal situation. If that was the case, then either she was more unstable than she had anticipated, or there was an outside force powerful enough to delete that much memory.