What characteristic does a "connoisseur" possess?

A connoisseur is someone who has expert knowledge and refined tastes in a particular area, such as art, food, wine, or music. The characteristic of expertise is central to the definition of a connoisseur, as it indicates a deep understanding and appreciation for the nuances that distinguish high quality within that field. This expertise often comes from extensive experience, education, and exposure to the subject matter, allowing a connoisseur to make informed judgments and provide insightful evaluations.

In contrast, the other options do not align with the concept of a connoisseur. Impartiality suggests neutrality and a lack of bias, which contrasts with the subjective opinions often held by a connoisseur based on their expertise. Inexperience would disqualify someone from being a connoisseur, as it implies a lack of knowledge. Neglect indicates a disregard for the subject, which is contrary to the engaged and informed perspective characteristic of a connoisseur. Thus, expertise is the defining attribute of a connoisseur.