A farmer walks into a hardware store and asks for a chainsaw that can cut down 6 trees in one hour. The salesman recommends the top of the line model. The farmer is suitably impressed, and buys it.
The next day he brings it back, complaining that it would only cut down 1 tree and it took ALL DAY!
The salesman takes the chain saw, starts it up to see what’s wrong, and the farmer says, “What’s that noise?”
A pedantic bore forced a conversation with a fellow passenger on a coast to coast flight, and made a great parade of his knowledge. The passenger listened as long as he could. Looking at him gravely, he said, "My friend, you and I know all that there is to know."
"How is that?" asked the bore, pleased with what he thought was a complimentary association.
"Well," began the traveler, "you know everything there is to know except that you are a bore, and I know that."