A recent episode of Dr Phil, which was the second part, dealt with a conflict between a son, his wife to be and now wife, and his mother (her mother-in-law to be and now mother-in-law). I thought this was a good study of the value of acknowledgements, and the harm you can do by not simply acknowledging something. Not apologizing for it necessarily, as this couple stated she always apologized but never changed. But an acknowledgement that it happened, and the acknowledger knows what it is that they did wrong or what bothered the other person (whether it was wrong or not). It was crazy how the mother-in-law started denying things she had admitted to (on tape) in the first episode of this.