Final answer:
A speech must have a clearly defined goal to be effective, as this allows for strategic preparation and delivery tailored to the audience's needs and the speech's intent, whether to inform, persuade, or entertain. Visual aids and outlines also play a crucial role in the effectiveness of a speech.
Step-by-step explanation:
The assertion that a speech does not need a clearly defined goal to be effective is false. A speech requires a well-defined objective to successfully inform, persuade, or entertain an audience. The formula for establishing a purposeful speech involves identifying the audience, determining the message, and choosing the most effective way to convey that message. This strategizing will culminate in a purpose statement, which guides the development of the speech. When a speaker knows their goal, the speech can be tailored to achieve that aim, whether it be to raise awareness about environmental issues or persuade people to alter their behavior.
Using visual aids can enhance a speech's impact, but they should complement rather than detract from the main message. Media should be chosen with care to underline and support the points being made. Moreover, preparing an outline can help deliver a speech that feels natural, enhancing the connection with the audience. President Franklin D. Roosevelt's Pearl Harbor speech serves as a historical example of an address with a clear purpose; it was structured both to inform Congress about the attack and to persuade them to declare war, showcasing the importance of having a focused objective.