The Sense of Order A Book by E. H. Gombrich The Tiling Patterns of Sebastien Truchet and the Topology of Structural Hierarchy perceptionartorder
The right overlap Overlap alone does not give structure. It can also give chaos. A garbage can is full of overlap. To have structure, you must have the right overlap. Christopher Alexander, A City Is Not a Tree The city's most vital organsThe multiplicity of living patterns structure