So Paddy goes for a job on a building site. The foreman says to him,
"Before I give you a job I need to find out what you know about building."
"Fair enough," says Paddy, "fire away."
"Right," says the foreman, "first of all, can you tell me the difference between a joist and a girder?"
"Ah, well," replies our friend, "that's a tough one, to be sure." [no racial stereotyping here!] "Let me t'ink now....joist....girder....joist...... AH! I have it!" says he.

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Joyce wrote 'Ulysses' and Goethe wrote 'Faust'!