In "Paris to the Moon," Adam Gopnik emphasizes the fluid nature of conversation, arguing that people do not strictly adhere to theoretical frameworks when they communicate. Instead, the theories they utilize are adaptable and shift dynamically throughout discussions, reflecting the ever-changing nature of human interaction.

Gopnik critiques the idea of restricting conversation to rigid theoretical constancy, suggesting that such a limitation misrepresents the essence of communication. Conversations are inherently spontaneous and responsive, illustrating how flexibility in thought is crucial to meaningful dialogue.