An American tourist asked a boat guy in Zanzibar, "Do you know Biology, Psychology, Geography, Geology or Criminology?"
The boat guy said, "No. I don't know any of those."
The tourist then said, "What the hell do you know on the face of this Earth? You will die of illiteracy!"
The boat guy said nothing. After a while the boat developed a fault and started sinking. The boatman then asked the tourist, "Do you know 'Swimology' and 'Escapology from Crocodiology'?"
The tourist said, "No!" The boat guy replied, "Well, today you will Drownology and Crocodiology will eat your Assology. I will not Helpology and you will Dieology because of your Badmouthology."