What is the condition of being unknown called?

The condition of being unknown is referred to as anonymity. Anonymity implies that a person's identity is not known or is kept hidden, allowing them to act or exist without being recognized. This concept is often applied in various contexts, such as online interactions, privacy issues, and social situations, where individuals may wish to maintain their privacy or avoid detection.

In contrast, the other options relate to different concepts. Identity pertains to the characteristics or qualities that define a person or entity, associated with recognition and visibility. Visibility indicates the state of being able to be seen or perceived, often linked to recognition or exposure. Exposure generally refers to the act of revealing something that was previously hidden, particularly relating to information or visibility. Therefore, anonymity specifically captures the essence of remaining unnamed or unrecognized, making it the correct choice.