One rule in a conversation

交談中或許你並不同意對方的看法，或許忍不住要插嘴，但是請你不要這樣做，因為這樣做很危險。當對方還有很多看法想要訴說的時候，他的注意力不會集中在你的身上。

If you disagree with them you may be tempted to interrupt. But don't. It's dangerous. They won't pay attention to you while they still have a lot of ideas of their own crying for expression.

Dale Carnegie <The Safety Valve in Handling Complaints>