Final answer:
Personal knowledge can be a starting point for a speech but must be supported by external evidence and justification to ensure credibility and sufficient grounding in justified true belief.
Step-by-step explanation:
The statement "Personal knowledge provides enough resources for a speech if you are knowledgeable" can be true or false depending on the context. While personal experience and knowledge can form a robust basis for a speech, relying exclusively on personal knowledge without external evidence or confirmation may not always be sufficient for justifying your claims and establishing credibility.
The concept of justified true belief implies that true knowledge must be justified with evidence and believed to be true, rather than being held true by mere coincidence or accident.
When preparing a speech, it's important to analyze your audience and consider their prior knowledge and relationship with the topic to determine the extent to which you need to provide background information or evidence.
In essence, personal knowledge can be a valuable asset for a speech, but it should be supplemented by testimonial evidence, external research, and a strong justification for the claims made. This ensures that the speech is well-rounded, credible, and convincing.