12 Movies That Made You Work Out The Answer Yourself

12. Blade Runner

The Question: Is Deckard (Harrison Ford) a human or a replicant?

This question has tortured Blade Runner fans ever since the film's original 1982 theatrical release, and Ridley Scott's subsequent Director's Cut and Final Cut only further fuelled the debate.

The main evidence pointing to Deckard himself being a replicant is the fact that Gaff (Edward James Olmos) leaves him an origami unicorn at the end of the movie. Considering that Deckard had a dream involving a unicorn earlier in the film, it implies that Gaff is aware of Deckard's dreams due to him being a replicant.

Opponents of the theory argue that it could merely mean humans and replicants share the same dreams, further blurring the line between what is and isn't human. Plus, Deckard being saved and spared by Batty (Rutger Hauer) at the very end of the movie is robbed of much of its emotional impact if he is indeed a replicant.

Somewhat predictably - and aptly - Blade Runner 2049 refused to shed much further light on Deckard's identity, though the fact he didn't run through walls as K (Ryan Gosling) did has been interpreted as further evidence that he is, in fact, human.

Either way, the mystery is far more interesting and entertaining than any potential answer, so it's really for the best for this one to remain debatable.