Legal Definitions - Unascertainable Cause

Unascertainable cause is a legal term used when multiple defendants are responsible for an injury, but it is unclear which one caused it. For example, if two drivers collide and a passenger is injured, it may be difficult to determine which driver's actions caused the injury.

In this situation, the burden of proof shifts to each defendant to prove that their actions did not cause the injury. If neither defendant can prove this, they may both be held responsible for the injury.

Another example of unascertainable cause could be a situation where a person is exposed to multiple toxic substances, but it is unclear which one caused their illness.

Overall, unascertainable cause is a legal concept used to determine liability when it is unclear which party is responsible for an injury or harm.