When we work on our interests from knowns and unknowns, it becomes clear that our knowns are our constraints. They are the givens within which we have to work, our boundary conditions.
Our unknowns are our possibilities. They are the edges of exploring and experimenting that lead to new discoveries and options.
This explains why we see such diverse productivity from equally talented and motivated groups. It's all about whether they're working predominantly from their knowns or from knowns and unknowns.