Necker cube
n. A line drawing of a transparent cube in which all lines and vertices are apparent which is ambiguous as to which two sides are in front of the other two sides and whether the view is from above or below the cube.
n. A line drawing of a transparent cube in which all lines and vertices are apparent which is ambiguous as to which two sides are in front of the other two sides and whether the view is from above or below the cube.
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