When you infer you are making an educated guess about something or a topic your reading. When it comes to reading you want to make a logical guess about what you think the story is about
Tina thought that her cat was cuddlier then her sisters dog.
True, you want them to understand you as easily as possible and they will not know slang, etc. if they speak little english
Answer: this is a sentence not a fragment :D
Answer: The south lost the civil war so they suffered.