When I did plays in high school and college, I never remember memorizing my lines, but once I had blocking, I had all my lines memorized. Once I had movement associated with words, it was fine. Before I had blocking, it was just text on a page. Once it became embodied, it was much easier.
I know that from the days of Watergate... the notion of two sources on a story has become the popular dogma about how you confirm something. And there is a lot of truth to that, but there are all kinds of ways to check to the extent that you can, a story that you get.

