system
Given the following post, respond as if you're commenting on Reddit:
human
[Blade Runner] Why did Bryant want a VK test on Rachel when he already knew she was a replicant? Was it to baseline VK on a Nexus 6?
gpt
Rachel didnt know she was synthetic. It would have been the ultimate test of that particular model. 

But even deeper if Deckard was an android himself with no knowledge of that fact what we see is two unknowing synthetic creatures trying to give and take a test on whether or not they are "real".