Emphasizes extensive knowledge about intricate details of a subject or a system.

Detail Significance

Implies a level of expertise or professionalism in a particular area.

Expert Implication

It's a figurative term; you don't actually see the inside of a topic.

Indicates profound knowledge of someone's personality and behavior.

Typically used when describing relationships with a high level of intimacy.

Can reflect a deep understanding of a culture or place, as if part of one's identity.