Whether something should be unique depends heavily on the context. Uniqueness can be a desirable or even a necessary property in many situations, while in others it may be irrelevant or even detrimental.

Here are a few examples to illustrate this:

• Identifiers: In computer science and databases, unique identifiers (like primary keys) are crucial for distinguishing between different records or objects. Without uniqueness, it would be impossible to reliably identify and retrieve specific data.
• Passwords: Ideally, each online account should have a unique, strong password. Reusing passwords across multiple sites significantly increases the risk of a security breach.
• Creative Works: In art, music, and literature, originality and uniqueness are often highly valued. A work that is too similar to existing works may be seen as derivative or uninspired.
• Experiences: People often seek out unique experiences, such as travel destinations or hobbies, to enrich their lives and create lasting memories.
• Everyday Items: In some cases, uniqueness isn't necessary or even desirable. For example, mass-produced items like pens or paper clips are designed to be identical for ease of manufacturing and use.

To determine if something should be unique, consider the following questions:

• What is the purpose of this thing?
• What are the potential consequences of it not being unique?
• Are there any benefits to it not being unique?

By carefully considering these questions, you can make an informed decision about whether uniqueness is important in a particular situation.