The Plot Hole: The biggie. The one on which the narrative of six films and countless spin-offs - nay, the entire history of cinema over the past thirty-odd years - rests.
We're talking, of course, about the incredulous decision of a Star Destroyer commander to let an escape pod go, during the middle of a pitched battle to locate the blueprints that will give the Rebel Alliance the upper hand.
Had George Lucas let the pod sneak off undetected it’d have been fine, but he draws attention to the damn thing by having the officer scan it for "signs of life." In a storyworld populated by robots.
The sensible thing to do would have been to blow it out of the sky just in case.
Reasonable Explanation: The officer is a Rebel sympathiser. Has to be.
He should have been awarded a posthumous medal in the film’s final scene. He did more to help the cause than Chewbacca anyway.