Do the aliens in 'Avatar' realise they are blue?

At the end of Avatar, Jake Sully, the main character, wakes up as an alien. The movie ends before he has the chance to say anything to his (blue) alien wife, but here’s my guess as to what he might say to her:

“But I thought you were blue!”

But, since she is blue, why might he say that?

For those who haven’t seen the film, what you need to know is that Sully is a human who, from the safety of his brain-interface chamber back at the lab, can remotely control a “soul”-less alien body. And, at the end of the movie, and through the miracle of human suspension of disbelief, his human self gets literally uploaded into the alien’s body. Sully thereby becomes a bona fide eight foot tall, blue alien, and in the final frame of the movie we see his alien eyes open.

Question is: What does Sully see when he opens his eyes? And, more to the point: Does his new alien wife still appear blue to him?

By way of answering, let’s back up and remember what visual systems are for. When we look out at our world through our eyes, we implicitly believe we are seeing it as it truly is. Our eyes and visual systems are to us objective scientific measuring devices. But evolution does not select for objective scientific equipment – evolution selects for visual systems that best serve the animal and its reproduction. Although often the best perception is one that veridically reflects the truth, sometimes the best solution is a “useful fiction,” a little-white-lie perception that serves us better than an accurate accounting of the actual.

>>> Read More @Telegraph.co.uk

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