There are known knowns. These are things we know that we know. There are known unknowns. That is to say, there are things that we know we don’t know. But there are also unknown unknowns. There are things we don’t know we don’t know.
Question: What do you think you don’t know that you don’t know? Guess that is an impossibility for you to know, as you don’t know what you don’t know. But hey, don’t rack your mind about it. You cannot anticipate things you don’t know you don’t know.
Just know they exist. Lots of them. Wait for them. All one can do.
Go ahead play it. That isn’t an unknown… it’s a known.