Wiktionary
plot hole
alt. A gap or inconsistency in a storyline that goes against the flow of logic established by the story's plot, or constitutes a blatant omission of relevant information regarding the plot n. A gap or inconsistency in a storyline that goes against the flow of logic established by the story's plot, or constitutes a blatant omission of relevant information regarding the plot
Wikipedia
Plot hole
In fiction, a plot hole, plothole or plot error is a gap or inconsistency in a storyline that goes against the flow of logic established by the story's plot. Such inconsistencies include such things as illogical or impossible events, and statements or events that contradict earlier events in the storyline.