The phrase "about a knowledgeable" is not correct and does not convey a clear meaning in written English.
It may be intended to describe a topic related to someone who is knowledgeable, but it lacks clarity and context.
Example: "We had a discussion about a knowledgeable expert in the field of renewable energy."
Alternatives: "regarding an expert" or "concerning a knowledgeable person".
Beer is the focus at Congregation, and Ensling is serious about providing a knowledgeable staff that will help the ale houses become centers of the craft beer community in Los Angeles.
Understanding mark-up isn't just about being able to use it, however, it's also about being able to talk about it in a knowledgeable and meaningful way.
I made a similar purchase last summer and, like your writer, discovered that one must handle a camera and learn about it from a knowledgeable person before making an informed purchase.
The small, hip store where you could actually find things nobody heard about, converse with a knowledgeable staff, and be assured to walk out with something special, was an endangered species.
Ask your teacher for help on subjects you're confused about, or ask a knowledgeable friend, older student, sibling, or parent.
The Council on Foreign Relations had bought all the seats at the Mitzi E. Newhouse Theater at Lincoln Center, and at intermission Mr. Rogers professed to be more excited than nervous about playing to such a knowledgeable audience.
Being positive and speaking about the job in a knowledgeable way shows you did your research, and that can win you big points.
Everyone keeps talking about Johnson being so football inexperienced that it is impossible for him to make a knowledgeable decision about his new general manager and head coach.
A former languages teacher, Joe is interested an knowledgeable about education and technology.
I recently foolishly entered an argument with a knowledgeable friend about the football-playing history of top flight managers.
