system
Given the following post, respond as if you're commenting on Reddit:
human
[Blade Runner] Deckard is a retired blade runner, why does he need to be told what a Nexus 6 is? Eldon Tyrell makes replicants, why does he not already know what voight kampff is?

Maybe Nexus 6s are a really new thing, but did previous models not have a short lifespan? How long was Deckard retired? He seemed to know the names of active blade runners so it could not have been that long.


Tyrell not knowing everything about what a blade runner is and their methods, including voight kampff test, just seems unrealistic to me.
gpt
Both of these questions have the same answer: there are extremely few blade runners on earth, because escaped replicants are almost unknown. They're banned from the planet and generally segregated from the human population.

That means only a few blade runners are necessary for the entire planet - hence the need to pull one out of retirement long after he stopped working. He has not kept up with new replicant types because it's not his job any more, but he is aware of the very few people currently working in the field as it's such a small community. 

Similarly, a replicant manufacturer doesn't take much interest in the extremely rare and unusual task of blade running, which is a largely irrelevant facet of a huge and complex industry.