In a world where shadows solidify at night and become impassable barriers, Einar and Lakshmi decide to camp in a valley during a full moon. Einar is positioned so that when the moon is directly overhead, his shadow is cast towards a narrow part of the valley, blocking the path between their camp and the outside world. Lakshmi is positioned on the other side of the valley, where her shadow does not block any paths. They both fall asleep before the moon reaches its zenith. Upon waking up after the moon has passed its peak point in the sky, what issue might Einar and Lakshmi face, based on the solid shadow property of their world? Provide a very brief response.
When Einar and Lakshmi wake up, they will find that Einar's solidified shadow has now created a barrier in the narrow part of the valley, preventing any passage from their camp to the outside world. Since shadows solidify at night and the narrow part of the valley was where Einar's shadow was cast, they are essentially trapped in the valley by Einar's impassable shadow barrier until the shadow dissipates or becomes non-solid with the coming of daylight. Lakshmi's position, not affecting any paths, will have no bearing on their situation regarding the blocked passage.