I was thinking about that optical illusion where the ballerina spins either clockwise or counterclockwise, depending on your perspective or supposed handedness. I think I have figured out how the brain processes it. It's a committee..
"It's a ballerina!"
"No, it's just a girl"
"Well, actually it's a drawing of a girl"
"Yes, but is it spinning clockwise or counter clockwise?"
"I say clockwise"
"Looks more like a kick than a spin"
"SHUT UP, DOUG!"
"Ok, who votes for clockwise? Remember we can always change it if we want
to."
...and so on.
I have a related suspicion about seeing things in general. A tree for instance. Light hits a tree, reflects back to the eye, and then your brain has to make a prediction based on that data.
"Well," it says smugly, "this pattern bears a striking resemblance to the pattern we have cataloged as 'tree', so I will wager a guess that this is also a 'tree'." And then it goes on enjoying it's morning bagel and coffee.
This works better if your inner dialogue sounds a bit like Stephen Fry, which mine often does.
12 hours ago

