Board Thread:Questions and Answers/@comment-197.87.149.237-20150131062759/@comment-1672596-20150131111227

Adachi Did It wrote: I don't think he forgot, why would he tell anyone else that info though? it was extremely top secret iirc and it was about the 1 person he admired the most, he's hardly gonna run to Kaz or Huey and blab all of it. Or am I misunderstanding your question? Actually, it's implied he DID tell Kaz about it.

"Snake: Kaz, I thought I knew everything about her [The Boss], but I still don't understand what happened to her at the end. // Kaz: There you are no different from that scientist woman. // Snake: When she didn't believe me, I realized something. That debriefing I heard could have been part of the cover story they made up. Now, even I'm not certain of what her real intentions were. Why did she take that mission? How did she feel about dying? Why was I chosen?"

It's pretty clear that the "debriefing" that Snake mentioned was the one EVA supplied to him. And Kaz replied "You want to know the truth?" Without even once questioning the debriefing.