Circular reasoning goes around in a circle (naturally), with nothing substantial in the middle. Here’s an example: ▶ The epidemic was dangerous because everyone in town felt unsafe and at risk. (The second part of the sentence provides no clarification about why the epidemic was dangerous.) A sentence fragment is defined as “a group of words that is not a sentence.” Okay, so what constitutes a sentence? Again, a sentence is a group of words that (1) has a subject, (2) has a predicate