Take the following as truth: The publisher sent unrevised bound proofs from which this review was prepared; unfortunately, there was no proof of an index, but the publisher has assured me that there will be one in the published book, a rather essential ingredient of a work with this title.
Then the following statement: "Even though the publisher unrevised proofs, they insisted that an index would be published along with it. " is true, false, or inconclusive?
Answer: True