He has already solved the problem.

He has already gone home.

He has already gone home.

He has already left the house.

That fact is already common knowledge.

We sent an email to make this information well-known.

When he learned that fact, he was surprised.

This rule should be something known to everyone.

As a matter of fact, he is the leader of our team.

In view of the facts, his actions are understandable.