The term "formal physical" doesn't have a widely recognized meaning. It's possible you are thinking of something else, or it could be a specific term used in a particular field or context.

To help me understand what you're asking, could you please provide more context? For example:

* Where did you encounter this term? (e.g., a book, a lecture, a conversation)

* What was the topic being discussed?

* Can you provide any further details or examples?

With more information, I can better understand what you mean by "formal physical" and provide you with a more helpful answer.