A Polak is looking to buy a saw to cut down some trees in his back yard. He goes to a chainsaw shop and asks about various chainsaws.

The dealer tells him, Look, I have a lot of models, but why dont you save yourself a lot of time and aggrevation and get the top-of-the-line model. This chainsaw will cut a hundred cords of wood for you in one day.

So the Polak takes the chainsaw home and begins working on the trees. After cutting for several hours and only cutting two cords, he decides to quit. He thinks there is something wrong with the chainsaw. How can I cut for hours and only cut two cords?, the Polak asks himself. I will begin first thing in the morning and cut all day, the Polak tells himself.

So, the next morning the Polak gets up at 4 in the morning and cuts, and cuts, and cuts till nightfall, and he only manages to cut five cords.

The Polak is convinced this is a bad saw. The dealer told me it would cut one hundred cords of wood in a day, no problem. I will take this saw back to the dealer, the Polak says to himself.

The very next day the Polak brings the saw back to the dealer and explains the problem. The dealer, baffled by the Polaks claim, removes the chainsaw from the case. The dealer says, Huh, it looks fine.

Then the dealer starts the chainsaw, to which the Polak responds, Whats that noise?