Indeed, the "design by wishful thinking" was a real eye opener for me. It is one of my favourite parts of SICP. It can also be explained as way to postpone dec

Indeed, the "design by wishful thinking" was a real eye opener for me. It is one of my favourite parts of SICP. It can also be explained as way to postpone decisions you can't clearly make right now. First, you pretend to have made the decision, and later on you implement the decision "you wish you had made".