What is tessera How does it put certain people at a disadvantage?

"Tessera" is not a commonly recognized term with a widely accepted definition. It might be a specific term used in a particular context, like a game, a scientific field, or a cultural practice.

Please provide me with more information about the context in which you encountered the term "tessera" so I can help you understand its meaning and how it might put certain people at a disadvantage.

For example, tell me:

* Where did you hear the term? (e.g., a book, a website, a conversation)

* What was the context? (e.g., a discussion about art, a game description, a scientific research paper)

* What was the general topic being discussed?

With more details, I can offer a more accurate and helpful answer.