Today I Learned Thursday: Mary in the Black & White Room

JonT had a video to watch said
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https://en.wikipedia.org/wiki/Knowledge_argument#Thought_experiment

Before you ask, yes this is because I just watched Ex Machina.

Mary is a brilliant scientist who is, for whatever reason, forced to investigate the world from a black and white room via a black and white television monitor. She specializes in the neurophysiology of vision and acquires, let us suppose, all the physical information there is to obtain about what goes on when we see ripe tomatoes, or the sky, and use terms like ‘red’, ‘blue’, and so on. She discovers, for example, just which wavelength combinations from the sky stimulate the retina, and exactly how this produces via the central nervous system the contraction of the vocal cords and expulsion of air from the lungs that results in the uttering of the sentence ‘The sky is blue’. What will happen when Mary is released from her black and white room or is given a color television monitor? Will she learn anything or not?

In the movie it's framed in a way of explaining how a computer works, which I think is an amazing analogy. Your computer knows everything there is to know about everything but still doesn't know what it feels like to experience the things it 'knows' about. I also like the little bonus that a computer is all 0s and 1s (black and white).

In this case it's framed more philosophically, is the "feeling" of something uniquely different than the full physical understanding of it?

What are some of your favorite thought experiments or paradoxes?

Or, what's some weird stuff you like to think about?

I'm expecting big things from you on this one, @joelmw.