Video for reasoning: fallacies
Simpsons: Season 7, episode 23
This is generally a dreadful episode, but there is a great example of a post hoc fallacy in a brief clip. After the mayor has started a “bear patrol” to keep the city safe, Homer and Lisa debate the patrol’s effectiveness. Lisa picks up a rock and argues that this rock must keep tigers away because there are not tigers visible. Rather than take the point, Homer offers to buy the rock.