Constant comments on Seeing Red: Dissolving Mary's Room and Qualia - Less Wrong
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Comments (152)
A physically plausible scenario would involve growing up under a monochromatic light source.
Growing up without sensory input actually affects the brain; see Wikipedia's article on monocular deprivation. I'm actually an example of this - I was born without the Mystic Eyes Of Depth Perception so I'll never know what stereoscopic vision "feels like".
I propose that "qualia" is a word that, like "microevolution", is mainly used by people who are very confused (and dissolving the question is the appropriate approach).
If you turn something or move around it, even if you only use one eye to do this, your brain puts together the succeeding images to create a three-dimensional visual experience of the scene. Here is an example. If you're curious about "what it's like" to have stereo vision, in my opinion it is not far off from this, without the movement.
Here are two more.
The link is well worth following. Wow! Stereo vision with one eye closed!