Ambiguity or fallacy is a word, statement, or phrase that contains more than just one meaning.
I hope this helps (:
What was the cause of dr Barnard s gloomy thoughts —- Answer: dr Barnards gloomy thoughts had probably stem from an accident that he had a few years ago while he and his wife were hit by a car. They were trying to cross a street after a lovely meal together. HOPE TGIS HELPS!!!
So that the reader can under stand the way the weighted is explaning
The rhetorical device used in this sentence is repetition.
Hope this helps =)