Eye see what you did there

In class we briefly discussed the quote by Shakespeare emphasizing that the eyes are the window to the soul. This is seen in everyday life. Usually when you're conversing with someone or looking for their attention, you look to see where their eyes are. You look to see if they're looking at you or paying attention to something else. With Blade Runner, there is no doubt that the eyes were a large underlying theme in the movie. The opening scene showed the reflection of the city in a pair of eyes, the test to weed out humans from replicants involved pupil and lens scans, also the eyemaker was the person who led Roy and the replicants to Tyrell. One subtle feature that stood out to me was the replicants' pupils when smoke crossed in front of them. They seemed to glow a dull red color, almost like the power-light on an application to let you know it's running off of a battery. I know a couple fairly common description of the eyes are dreamy or glossed over, but the replicant eyes were almost portrayed as dreadful or dangerous. They almost seemed like they should be projecting light versus taking it in and analyzing it. I feel this was a huge allusion to the differences between robots and humans. The red eyes were symbolic of a machine analyzing code and initiating the correct process or algorithm to complete the next logical movement. Whereas humans don't think logically 100% of the time, they use emotions and experience to also govern their day-to-day decisions. Interestingly enough, Tyrell Corp decided to give the Nexus-6 replicants false memories. This brings up an incredibly interesting philosophical argument that I stumbled over years ago. Have we really lived our entire life, or could we have materialized 5..10 minutes ago along with all of our experiences and memories? Eerily similar to the experience of the Nexus-6 and Rachel. Personally I believe to be human, but I've never actually opened up the back of my head to see if there's actually a brain there or if it's a circuit board (don't worry I don't intend to anytime soon). But how would we ever know? How could we ever know?