Well, just that focussing on whether or not you can pin down enough "facts" before risking to start talking about it can be a defense. It can distract you from confronting the feelings about telling and what you think you will feel after telling, what you think will change after telling, maybe other fears? It's a bit like how I feel compelled to clean house when I'm coming up on a writing deadline: that procrastination masks fears about competence and judgement. Knowing that helps me to accept it--and move forward.