SICP says "Program == Language Evaluator" What does this  mean?
devijvers: 1. Turing machine: there is no difference between data and instructions. Meaning: any data can be interpreted as instructions (e.g. 1 + 1, GET /, [ 1, 2, 3], ...)2. Writing is turning ideas into meaningless symbols, reading is turning meaningless symbols into ideas.3. The alphabet consists of meaningless symbols and meaningless sounds.Conclusion: any sensory cues can be interpreted, given meaning, and be converted into action; also by computers.