Interrogatories play a key role in litigation: They’re used to gather potential evidence to support a party’s contentions, including facts, witnesses, and writings, or to determine what contentions an opposing party is planning to make. CCP §2030.010(b). But just because they ask doesn’t mean you have to answer. You can object to interrogatories on many grounds. Here’s a list of objections to keep handy when the next batch of interrogatories arrives.