Shades of Grey
This question is just another play with words... It asks if JWs believe that they alone will be saved but it doesn't ask the more relevant and specific question which is: "Do Jehovah's Witnesses believe that they alone will survive Armageddon?". By asking the question the way they did, this gives them an "out". The "out" in this case is that they can now deviate the reader's attention to people in the past (rather than who exactly will surivive Armageddon).
very clever indeed...