Write a scene consisting entirely of dialogue between two characters who cannot physically speak to each other (they might be in different locations, underwater, in a library, or otherwise unable to use their voices). The dialogue must convey the full meaning of their conversation without any action lines, descriptions, or narrator's comments. Consider how the characters might communicate through alternative means such as writing, sign language, telepathy, or technology. The scene should reveal a conflict, a secret, or an important relationship development. Minimum 500 words.