To "have good authority" refers to possessing reliable or credible information or knowledge about a particular subject. This phrase conveys a high degree of trustworthiness and expertise in the context being discussed. When someone says they have good authority on a matter, they mean they can provide accurate and well-founded information.
Having good authority implies having access to reliable sources or firsthand experience with the subject in question. It suggests that the individual has thoroughly researched and studied the topic or possesses extensive expertise and understanding. Such individuals are often considered reliable and knowledgeable authorities within their field.
"Having good authority" also indicates that the information being provided is trustworthy and can be relied upon. This phrase suggests that one's statements or claims are based on well-established facts, research, or experiences instead of mere speculation or personal opinion.
Furthermore, having good authority can also be associated with having a position of influence or a perceived level of expertise in a specific area. In such cases, individuals who possess good authority are commonly trusted and respected as credible sources of information.
In summary, to "have good authority" means possessing reliable knowledge, well-founded information, and credibility, either through extensive research, firsthand experience, or being recognized as an expert in a particular field.