1.   Herbal remedies tend to treat the symptoms, even if the actual cause is not known.

2.   The experts believe they know the causes of the crime wave but they cannot agree on a cure.

3.   The cause was never known but affected soldiers all had close contact with soil -- which may explain why the cavalry and officers were rarely affected.

4.   Where this happens the intervening cause is known as a novus actus interveniens and breaks the chain of causation between the defendant and plaintiff.

5.   No cause is known for the mysterious catastrophe, which is now claiming members of related species.

6.   Chief Insp Copeman admitted the police did not even known the cause of the accident.

7.   You know what I mean, cause you know.

8.   At first, no one knew the cause.

9.   Bacon said American military officials still do not know the cause of the crash, in which the pilot survived and was rescued.