4. Charles Foster Kane Didn't Die Alone
Whenever Citizen Kane is brought up as a contender for greatest film of all time (although it's reputation was dented recently by the next entry on this list), people are quick to state Orson Wells' magnum opus has a glaring plot hole present less than two minutes into the film. His last word, Rosebud, spurs the entire plot into action, but no ones there to hear it. The maid runs in just after, but theres no chance that shed have heard it from that distance, even within the vast and echoey Xanadu. Except that it only takes a watch of the film to realise that theres a clear solution. A journalist on the trail of Rosebud interviews many of people from Kanes past, most importantly his butler. As well as telling a haunting story of Kanes second divorce, he states he was in the room with him when he died; a plot hole solved in one viewing. This point has permeated into general film geek knowledge, despite its quick solution. Its likely many havent seen the film and are just repeating it to create the illusion of having watched it to save face.