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This Irishman went for a job on a building site and the foreman warned him that he'd have to answer some difficult questions.

"'That's OK,' said the Irishman.

"'You're absolutely sure?' asked the foreman.

"'Absolutely,' said the Irishman.

"'Right,' said the foreman. 'What's the difference between a joist and a girder. Think carefully.'

"'Well,' said the Irishman, 'Didn't Joyce write Ulysses and Goethe write Faust?'