Another rule used sometimes in determining the issue of proximate cause is the direct cause rule. Polemis. The direct cause rule provides that a defendant is responsible for all consequences which follow in unbroken sequence, without an intervening efficient cause, from the original negligent act. Such consequences are natural and proximate, and the defendant’s negligence is the proximate cause. The defendant does not have to foresee the exact kind of harm as long as some harm was foreseeable.