Final answer:
The quote from "Superman and Me" serves as a metaphor comparing family members to paragraphs, signifying their unique but interconnected roles within the family unit.
Step-by-step explanation:
In "Superman and Me" by Sherman Alexie, the quote "Inside our house, each family member existed as a separate paragraph" suggests a metaphorical comparison between text structure and family dynamics. The implication is that, just like a paragraph which encompasses a single, unified idea, each person in the family had their own distinct identity and role within the household. The analogy highlights the importance of each individual's uniqueness, yet also hints at a structure where, although they exist separately like paragraphs within the narrative, they altogether form a cohesive story. This reflects how Alexie perceived his family members as interconnected yet independent, akin to how paragraphs are part of a larger narrative but maintain their own purpose.