Rumsfeldian Signs

 When the exit sign tells you about their known unknowns:

So sad, Exit 257 - you want some "Attractions" but none yet...

And then there are the exit signs that don't even know what they don't know:

photo creds: Irene

Or, as Donald Rumsfeld famously called it, their "unknown unknowns":

P.S. I just found out that Rumsfeld had first heard of the concept of known unknowns and unknown unknowns from a NASA administrator.  No wonder this speech of his resonated with me and so many others at the time.  Just goes to say, you can learn something from anyone if you care to!