A beautiful idea put forward in a small book, Laws of From, by George Spencer-Brown 
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Keynote: Explorations in Laws of Form — Louis H Kauffman
YOUTUBE RQvazsnkriA Keynote: Explorations in Laws of Form — Louis H Kauffman
digraph { Aesthetic Value Motive Intention Instruction Name Calling [color=red penwidth=3] Recalling Law1 [color=red penwidth=3] Indicate Motive Distinction [color=red penwidth=3] Containment Boundary Crossing [color=red penwidth=3] Recrossing Law2 [color=red penwidth=3] Content Sides In Out Aesthetic -> Value Value -> Name Name -> Indicate Name -> Calling Calling -> Law1 Recalling -> Law1 Indicate -> Value Value -> Motive Value -> Crossing Motive -> Distinction Motive -> Crossing Intention -> Crossing Instruction -> Crossing Distinction -> Boundary Distinction -> Containment Boundary -> Content Crossing -> Law2 Recrossing -> Law2 Crossing -> Boundary Content -> Sides Sides -> In Sides -> Out }