In a persuasive speech, making a bandwagon appeal is an example of using an unsubstantiated opinion. This is because a bandwagon appeal is a persuasion technique where the speaker encourages the audience to agree with the majority because "everyone else is doing it." It lacks factual evidence or logical reasoning to support the argument.
When someone uses a bandwagon appeal, they are essentially trying to convince others to accept their viewpoint based on the popularity of that viewpoint rather than on its merit. It plays on people's desire to fit in or be part of a group, rather than on providing solid evidence or reasoning to support the claim being made.
To sum up, a bandwagon appeal relies on popular opinion rather than on proven facts or substantiated opinions, making it an example of using an unsubstantiated opinion in a persuasive speech.
