Credibility is the quality of being trusted and believed in, therefore a source may be credible in some ways and less credible in other ways depending on reputation.
For example, a religious leader such as a Vicar is seen to be a very credible source due to their beliefs. When their actions match with their beliefs they are trusted, leading them to have a good reputation. However, if their actions publicly contradict what they said they believe in, then they will become less trustworthy and will no longer be a credible source because they will develop a bad reputation.
Explanation:
The above paragraphs are an example of how a religious leader (source) may be more credible in some ways and less in others depending on their reputation which is based on whether their actions public contradict their beliefs.
