Let me try to put my reasoning on this in a way that may be more easily understood by you and the others who just like to yell at me.

My football team is competing with your football team. I have come into possession of your playbook. You don't know this. You have a suspicion that I might because I was in a place where one might be kept.

Is it in my best interests, if I'd like to keep and exploit my advantage, to let you know that "Yeah, I found it!!".