I agree with you that Emma uses diversion very skillfully in conversations with her father & even moreso in conversations with her father & any others who might raise or respond to topics in any way that he might construe to be either contradictory to his opinions (or those of Mr. Perry) or critical of Emma. I think the way she "works the room" at the dinner at Hartfield is admirable, & could be used in a training manual for ambassadors. I consider this not manipulative as in gaining some end, as maintaining the peace & status quo of her father. As critical as I am of Emma for her snobbery & interference with Harriet, I do believe she has many good qualities, not the least of which is her affection for Mr. Woodhouse. She is dedicated to his comfort & happiness, not only because it is in her best interest to be so but because of great affection for him.