Who is allowed to tell lies?

The value of truth-telling is very high. A sharp line is drawn between in-group and out-group. Truth is for the in-group. Lying to outsiders or performing other negative acts toward them will either be given different names or different evaluations, or both.

The frame provides license. A lie revealing itself as a lie is not called a lie but a fiction.

People are much happier when you agree with them and tell them what they want to hear.