chitspa wrote:As we all know, for a 2D person to look behind them is to flip over and look up-side down. And when to 2D people meet face-to-face, one person is facing the left and the other is facing the right. This means that when a 2D person is born, they will be facing that one way for the rest of there lives. How can this be related to a 3D person?
I think the closest analogy for 3-d people is in using the rear-view mirrors while in a vehicle. We're all built with our left eye on our left side and our right eye on our right side (coincidence? I don't think so). Looking in the rear-view mirrors flip-flops left and right on us in much the same way up and down would be flipped for the 2-D person. It doesn't take long to get used to how all of this flipped information integrates with the rest of our world. It does take some time when switching vehicles (especially ones of vastly different size and/or height).
This also brings up another point: a 2-d person could, rather than stand on its head, hold a mirror up in front of itself at such an angle so as to see behind.