There are three crazy people trying to escape from the madhouse. The leader says to the other two:
-Go to see the wall, if it's low, we will jump it, if it's high, we will dig a tunnel under it. We are here again in an hour and you will tell me.
One hour later...
-Sir, sir, we cannot leave!
-Why not?
-There is no wall!
-Go to see the wall, if it's low, we will jump it, if it's high, we will dig a tunnel under it. We are here again in an hour and you will tell me.
One hour later...
-Sir, sir, we cannot leave!
-Why not?
-There is no wall!
