>>213471395One of the bigger points of evidence people point to is Gaff creating origami figures which predict Deckard's actions. A chicken, right before Deckard caves to threats from his former boss which force him to take the job, a little paper man with an erection, before Deckard goes to hunt Zora in the stripclub, and the Unicorn - which has little context in the theatrical cut, but which Deckard dreams about in Ridley's cuts of the film.
Contrary to rumors, the Unicorn dream sequence was originally filmed for Bladerunner and was not footage shot for Ridley's fantasy film Legend, which also featured a Unicorn. The unicorn dream was originally planned. Gaff couldn't possibly know what Deckard had been dreaming, unless he was some kind of eastern psychic, or if, say, he knew what Deckard's memory implants were.
Another suggestive detail: the Replicants are obsessed with photos. Physical reminders of their false memories. Deckard's piano is covered with them.
Sebastian is a genetic designer for Tyrell. He has "methuselah syndrome", a disease which causes his organs to deteriorate rapidly - isn't this curiously similar to Replicants having a designed pre-deterimined short lifespan.
Sebastian creates "toys", two of which seem to be little cloned midgets. This is actually horrific if you think about it for more than a second - he's somehow created these little guys that are biological and yet behave like wind-up toys. Utterly bizarre detail, like something straight out of a dream.
If we buy the theory Deckard, and indeed everyone in the story is a Replicant (in fact in an early draft even Tyrell was meant to be a Replicant, who's head would explode into sparks and bits of clockwork when Roy crushed it - the real Tyrell being long dead), then it makes Tyrell a kind of toymaker himself. He's created a whole city of little replicant toys, living replicant lives.
Sebastian being a toymaker who has made himself his own toys and has a short lifespan is suggestive