Everything you thought you knew about Blade Runner is wrong.

Rating: 8/10 (12 October 2016)

Clearly, Gaff was psychic.
How else would he know which rooftop Deckard was on in the climax?
How else would he know about Deckard's dream? His origami was his presentation of the reading he has received from his subject's mind.
How did he know Deckard was chicken? He read his mind. But only when Deckard was present.
How did he know Deckard was horny? He read his mind. But only when Deckard was present.
His final origami statement - the unicorn - is the result of finally being able to see Deckard's unicorn thoughts - but it only came to him once he was in Deckard's apartment. It took him longer to present his origami this time because Deckard was not in Gaff's company when he had the dream. You see?
He left the unicorn to let Deckard know that he had succeeded in reading his mind for the last time and he is now free to leave with Rachael. Indeed, when Deckard picks up the origami unicorn , we can see him nodding. He is essentially saying 'Well done, Gaff. You got it right. You took your time on this occasion but you did get it right.'
In an outtake - he claims Deckard 'is a deep one.' This indicates he is harder to mind read than the cases that he is used to.
Ladies and gentlemen, I present to you the government psychic, Gaff.
NOW, ONTO MY NEXT ANALYSIS:
THERE ARE NO REPLICANTS IN THIS FILM.
The Tyrell Corporation is simply an arm of the government who pretend to create artificial beings and press upon the less important members of society that they are, indeed, a creation of Tyrell to keep them in their place - cleaning toilets and brushing up etc...
The ultimate form of pleb control.
Submissive humans who think they are replicant and remain submissive for fear of being switched off by the powers that be.
Clearly the case.