system
Given the following post, respond as if you're commenting on Reddit:
human
[Blade Runner] If Deckard was a replicant who didn't know he was one, what was he doing on police detail? The only other such model was an experiment close to Dr. Tyrell himself.
gpt
Deckard was implanted with the memories of Gaff. Remember how Gaff walks with a limp and Deckard is has been "retired"? Gaff got injured in the line of duty and now they have the mother of all replicant problems with their best Blade Runner unable to hunt. So they take all of his skills and memory and put them in a replicant, Deckard.

It's why Gaff is so resentful to Deckard throughout most of their time together. Deckard is doing the job *he* should be doing but can't because of his injury. It's also why Gaff knows that Deck dreams of unicorns those are literally his dreams.

He only softens up to Deckard in the very end when he's finally done with Batty. And what does he say "You've done a *man's* work, sir". To Gaff that's the ultimate compliment - you've done as well as a human.