A more thorough explanation:

A public fact is something that actually exists and is known by the public. It can be a tangible thing, an actual occurrence, a relationship, or a state of mind such as intentions and opinions. It can also be an event or circumstance that is not disputed and is accepted as true.

For example, it is a public fact that the Earth revolves around the sun. This is a scientific fact that is widely accepted and known by the public. Another example is that it is a public fact that the United States declared independence from Great Britain in 1776. This is a historical fact that is widely taught and known by the public.

Public facts are important in legal proceedings because they can be used as evidence to support a claim or defense. They are also relevant in invasion-of-privacy claims, where a fact that is in the public domain is not considered private.