Passage Summary: A book editor explains their rules: they only take fiction from agents or people they asked, and they only look at nonfiction from celebrities or people whose proposals they liked first.

Reasoning: The editor establishes strict criteria: fiction is either from agents or requested; nonfiction is only considered if the author is famous or if a proposal was reviewed and the manuscript was then requested.

Analysis: This 'Must be True' question requires us to follow the editor's logic to its necessary end. We have two sets of conditional rules. For fiction: Published -> (Agent OR Requested). For nonfiction: Seriously Considered -> (Renowned OR Requested after Proposal). If we are told a nonfiction book was published by a non-famous person, we can conclude with absolute certainty that the editor must have requested it after a proposal review. Look for an answer that correctly applies these 'if-then' scenarios without adding outside information.