Imagine you're on a ship sailing away from the shore. At first, it looks like the land is getting smaller, but after a while, the whole land disappears below the water. To someone who hasn’t seen that before, it might seem like the world ends at the edge of a flat plane. That’s why many people believed the Earth was flat for a long time.
Examples
- An old sailor believes that if he sails far enough, he will fall off the edge of the world.
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