What is wrong with this triangle? Could you use wood and nails to build something in three dimensions that looks just like this? In fact you can, although it might take you a while to figure out what shape you would need to construct. Why is it so hard to figure out? Because your wooden construction would look like this image from only one very special viewpoint. Your Visual Intelligence normally rejects interpretations of images which would entail that the eye is viewing the image from a very special viewpoint. So your visual intelligence refuses to tell you what the construction should be. Instead you must rely on your rational intelligence to figure it out, and your rational intelligence is, in these matters, much slower than your Visual Intelligence.
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