It shows your thinking
A young female teacher was giving her class of six year olds a quiz "behind my back I've got something red, round and you can eat it. what is it?" she asked. "an apple" replied little Raymond "no," said the teacher " it's a tomato but it shows your thinking." "I've now got something round, a greenish colored you can eat it." "An apple," replied little Ian "No it's an onion, but it shows your thinking." Little scruffy Johnny at the back of the class says "I've got something under my desk that's an inch long, white and it has a red end." "Dirty little boy," said the teacher "No it's a match, but it shows you were thinking," he answered.