Discovery and interrogatories allow parties to obtain relevant information from opponents to assess their cases. Discovery concerns obtaining documents, while interrogatories involve answering questions under oath. The court has discretion to order discovery and interrogatories if necessary for fair case disposal or cost savings. Privileged documents like legal advice are exempt from discovery. Parties have duties to conduct thorough searches and provide full, truthful answers throughout proceedings. Non-compliance can result in sanctions like dismissing claims or defenses.