Definition: A defense theory suggesting that a third party, rather than the defendant, committed the act.

The Forensic Gap: In the case of the “falling ladder,” the court concluded that no one else but the defendant could have dropped the object. 

However, this conclusion is a Legal Fallacy if other individuals were present in the same spatial environment. If Party A (the defendant) was in a semi-conscious state after sleep, and Party B (a third party) was in an active state of conflict with the “victim,” the probability of the third party’s involvement cannot be ruled out. 

A conviction cannot stand on the mere “likelihood” of one person’s guilt when another person with a stronger motive had equal physical access to the scene.