A narrative inconsistency that undermines the credibility of a story is a lapse in logic or fact. This may involve a gap in the storyline, an unexplained event, or a contradiction within established rules of the fictional world. For instance, if a character is established to be unable to swim, but later effortlessly swims across a river without explanation, this presents an illogical break within the narratives established context.
The absence of a coherent narrative structure can significantly impact audience engagement. When such inconsistencies arise, the suspension of disbelief weakens, potentially diminishing the emotional impact and overall enjoyment of the work. A consistent internal logic, while not necessarily mirroring reality, is essential for maintaining the integrity and perceived quality of the storytelling. Historically, the recognition and discussion of such lapses have been a part of critical analysis, influencing how narratives are constructed and perceived.