An icon is a symbol equally incomprehensible in all human languages An icon is a symbol equally incomprehensible in all human languages. There's a reason why humans invented phonetic languages. Jef Raskin, Steve Jobs iconographysymbols
What the problem is Sometimes the problem is to discover what the problem is. Gordon Clegg, The Design of Design (Cambridge Engineering Series) The heart of systems engineeringComplete and consistent requirements problemsdesignux