Maya lin's memorial has one corner submerged into the earth; the effect on visitors is that they are in the space of the dead, falling down, alone in the world, winners of the war,

the answer of "what has three legs but never walks" is a yard stick. this answer can be found at

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artists need to create a realistic interpretation so that people in general can relate to the artwork. for a common people, an artist's impression gets increased only if he can create something which would look realistic. an abstract is difficult for a common people to understand whereas if a person can draw a girl with simple pencil sketch and if that looks like a real figure then the latter will be praised more than the former.