A knight arrives at a castle carrying a lance that is five feet long. The guard tells him that no-one is allowed in the castle with an object that is over four feet long. The knight is a tad upset, but then has an idea. He goes into town, finds the local carpenter and asks him to make something. The knight then returns to the castle and the guard lets him in. Due to his clever thinking, the knight finds himself inside the castle with his lance. The lance is fully functioning, and has not been cut in away way. How is this possible?
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