Carve on Gunwale of a Moving Boat
In the Spring and Autumn Period, a man from the state of Chu was taking a boat across a river when he dropped his sword into the water carelessly. Immediately he made a mark on the side of the boat where the sword dropped, hoping it can be of help to find the sword. After the ship was in port, he went into the water to search for his sword at the place where he had marked the boat. However, nothing was found after a search.
How could he find his sword? As we know, the boat had moved but the sword had not. Isn’t this a very foolish way to look for a sword?