Design, Designing and Theory

Purpose, function, emergence, manipulation, interrelation and aesthetic are some properties of design. What is rational design and how it interrelates with other naturally and socially occurring things is of theoretical and practical concern. In set theoretic terms if N is the set of natural design decisions the Theory of Deferred Action explains the set of design decision D such that: % MathType!MTEF!2!1!+- % feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaeiraiaab2 % dadaGadaqaaiaabIhacqGHiiIZcaqGobGaaeiFaiaabccacaqG4bGa % aeiiaiaabMgacaqGZbGaaeiiaiaabggacaqGGaGaaeOCaiaabggaca % qG0bGaaeyAaiaab+gacaqGUbGaaeyyaiaabYgacaqGGaGaaeizaiaa % bwgacaqGZbGaaeyAaiaabEgacaqGUbGaaeiiaiaabsgacaqGLbGaae % 4yaiaabMgacaqGZbGaaeyAaiaab+gacaqGUbGaaeiiaiaabEhacaqG % PbGaaeiDaiaabIgacaqGGaGaaeyEaiaabccacaqGWbGaaeOCaiaab+ % gacaqGWbGaaeyzaiaabkhacaqG0bGaaeyAaiaabwgacaqGZbaacaGL % 7bGaayzFaaaaaa!6A0A!]></EquationSource><EquationSource Format="TEX"><![CDATA[$${\text{D = }}\left\{ {{\text{x}} \in {\text{N| x is a rational design decision with y properties}}} \right\}$$