"I thought I told you to keep an eye on your cousin," the mother said. "Where is he?"
"Well," her son replied thoughtfully, "if he knows as much about canoeing as he thinks he does, he's out canoeing. If he knows as little as I think he does, he's out swimming."
Explaining the population explosion of the world a teacher was elaborating
"Suppose all world population are walking and jumping off the globe.
The line will still be endless"
A student appeared confused and the teacher clarified " You see as and when a person jumps off another will be born and the line will continue for ever"
Still the young student wore the bewildered look "What is the doubt" the teacher asked. You said, "You said, they were all walking, teacher"