What is relevant information relevant to the subject matter involved in the action?

The court may order discovery of any matter relevant to the subject matter involved in the action. Relevant information need not be admissible at the trial if the discovery appears reasonably calculated to lead to the discovery of admissible evidence. "Relevance for purposes of discovery is defined very broadly." Garneau v. City of Seattle, 147 F.3d 802, 812 (9th Cir. 1998).