Person A asks somethingPerson B repliesPerson C agreesPerson D disagreesPerson A repliesPerson E asks some question
When a discussion goes like this, you have to remove all the old
discussions, if you want to add content.
quoting all the previous discussions is called over quoting.
Just imagine, how it will look, in the previous example, all the
content are huge paragraphs instead of single lines.
So, trimming all the unwanted content is always good.