A chap went for a job on a building site. He was doing really well on the trial tasks that the foreman set him. The foreman said, “I just need to ask you one theory question - get it right, job’s yours. What’s the difference between a girder and a joist?”

"That's a funny question to ask a builder," said the chap, "but anyway, the answer is that Goethe wrote Faust and Joyce wrote Ulysses”.