A professor was travelling by boat,on their way he askd the sailor 'Do you know Biology? Ecology? Zoology? Embraeology? Epidemology? 'NO' said the sailor. Prof got angry & said what the hell do you know? you wil die of illiteracy' One hour later the boat started sinking. the sailor looked at prof & said' Do you know Swiminology & Escapeology from Sharkology?'NO' said the Prof. Well that means Crocodileology wil eat your Headology & you wil Dielogy with your Knowlelogy because of your Mouthology