Final answer:
The statement is an example of a logical fallacy called appeal to authority. It assumes that because a lion expert said something, it must be true, without considering other evidence or logical reasoning.
Step-by-step explanation:
The statement 'A lion expert says that a lion's roar can be heard from 5 miles away. Therefore, it is true.' is an example of a logical fallacy called appeal to authority. This fallacy occurs when someone relies solely on the opinion or authority of an expert, without considering other evidence or logical reasoning.
In this case, the statement assumes that because a lion expert said something, it must be true. However, the truth of a statement should be evaluated based on multiple sources of evidence and logical reasoning, rather than solely relying on an expert's opinion. Therefore, the statement is not necessarily true.