During a family vacation, siblings Jack, Jill, and Julie are exploring a cave. Jack finds a shiny rock and shows it to Jill before hiding it under a nearby pile of rocks. As they continue exploring, Julie overhears them talking about the shiny rock and decides to find it herself. She locates the rock and hides it in her pocket without telling anyone. When they return to the spot where Jack hid the rock, where do Jack and Jill think the shiny rock is? Respond very briefly.
Jack and Jill think the shiny rock is still under the pile of rocks where Jack originally hid it. This belief is because Jack showed the rock to Jill and then hid it, without anyone else knowing about the hiding spot at that moment. Julie found the rock later and took it without informing her siblings, so Jack and Jill have no reason to suspect that the shiny rock's location has changed. They are unaware that Julie overheard them and subsequently located and pocketed the rock.