Choose a topic that is difficult or controversial to explain. Some good topics include hoaxes, unusual sightings (e.g. UFOs, Bigfoot, the Loch Ness monster), the supernatural or paranormal, events that are the subject of conspiracy theories, unsolved crimes or other court cases, etc.
The fallacy committed in the statement "Thomas Jefferson owned slaves, so slavery must have been a good idea" is the appeal to false authority. This fallacy occurs when someone tries to support their argument by referring to someone who is not an expert in the relevant field or whose expertise is not applicable to the topic at hand. In this case, the argument assumes that because Thomas Jefferson, a notable historical figure, owned slaves, it must mean that slavery was a good idea. However, owning slaves does not make Jefferson an authority on the morality or justification of slavery, and his ownership does not provide valid evidence to support the argument. To identify this fallacy, it is important to critically examine the logical connection between the authority figure and their relevance to the argument being made.
