Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In the law, a proximate cause is an event sufficiently related to a legally recognizable injury to be held the cause of that injury. There are two types of causation in the law, cause-in-fact and proximate (or legal) cause. Cause-in-fact is determined by the "but-for" test: but for the action, the result would not have happened. For example, but for running the red light, the collision would not have occurred. For an act to cause a harm, both tests must be met; proximate cause is a legal limitation on cause-in-fact.