Final answer:
A narrative beginning with stories proving the special bond of twins engages readers with the compelling nature of twinship and sets the stage for exploring themes like identity and connection.
Step-by-step explanation:
Writers often begin narratives with stories to prove the special bond of twins because it draws readers into the unique and often mysterious nature of twinship, which can be compelling both emotionally and intellectually. By using real-life cases of twins, such as those who grow up apart and discover each other later, authors can explore themes of identity, connection, and nature versus nurture.
In literature, examples like Roderick and Madeline, or the use of doubling in memoirs, serve to enhance thematic elements such as fatalism or self-reflection. Starting with such stories sets the stage for these deeper explorations.