As I have just got my degree in Theoretical Physics, I thought this joke may be appropriate.
Two Theoretical Physicists are lost at the top of a Mountain.
Theoretical Physicist No 1 pulls out a map and peruses it for a while.
Then he turns to Theoretical Physicist No 2 and says: "Hey, I've figured it out. I know where we are."
"Where are we then?"
"Do you see that mountain over there?"
"Yes I am not stupid." ----- "Well… THAT'S where we are."