What can be inferred about Bobby from his interaction with Jamie?

The inference that Bobby is deaf and understands Jamie through facial expressions is supported by the context of their interaction. This suggests that Bobby relies on non-verbal communication cues to engage with Jamie, indicating a level of adaptability and awareness of others' expressions. Understanding someone through facial expressions implies that Bobby has developed skills to interpret emotions and intentions without needing verbal communication, which further emphasizes his ability to remain involved in the conversation despite a potential hearing impairment.

This choice reflects a deeper insight into Bobby's character, showcasing his ability to connect with Jamie uniquely and effectively, highlighting his social awareness and capacity to communicate in alternative ways.