Type: Diary Characters: Isaac Clarke Chapter: 12 Can be found: Chapter 12 Objectives Tab Transcript:
Was Kendra right? Am I losing my mind? Nicole was dead this entire time. A hallucination created by the Marker. This whole time, it was the Marker pushing me to return it to the planet. It was sentient and alive in some way. And now, Kendra had it again. I got to get back to the shuttle and get off the planet before the chunk of rock smashed into it.
According to numerous scenes in Dead Space 2, Isaac was already sure that Nicole was dead even before Kendra showed him the full video. He was just keeping himself in denial by the end of the game. This may explain why Isaac appears to accept the truth so quickly while writing this log.