Final answer:
The detail that the children cannot see the man in the well highlights themes of perception versus reality, suggesting deeper philosophical questions about truth and awareness.
Step-by-step explanation:
The fact that the children cannot see the man in the well is an important detail because it raises questions about perception and reality. It suggests a deeper philosophical issue where what is real may not always be what is perceived. This theme is common in literature, where characters must grapple with illusions, deceptive appearances, or hidden truths. The inability to see the man could represent a lack of awareness or understanding, symbolizing how people often overlook the truth or are blinded by their own biases and assumptions.