I've found that good dialogue tells you not only what people are saying or how they're communicating but it tells you a great deal - by dialect and tone, content and circumstance - about the quality of the character.
E. O. WilsonAll my life I have placed great store in civility and good manners, practices I find scarce among the often hard-edged, badly socialized scientists with whom I associate. Tone of voice means a great deal to me in the course of debate. I despise the arrogance and doting self-regard so frequently found among the very bright.
E. O. Wilson