It is probably the case that Mary went to the office. There is a very good chance that Bernhard is a rhino. It is highly unlikely that Gertrude is a cat.
It is impossible that gertrude is a cat, or Mary went to the office.
It is probable that gertrude is a cat, or Mary went to the office.
It is impossible that gertrude is a cat, or Mary went to the office.
Gertrude is a cat, or Mary went to the office.