Less is not arbitrary. Be it fewer assumptions, variables, bits, rules... And these are all abstractions. Abstractions can be counted, so all simple really mean

Less is not arbitrary. Be it fewer assumptions, variables, bits, rules... And these are all abstractions. Abstractions can be counted, so all simple really means is fewer abstractions. Theories tend to refine themselves because ultimately we arrive at one word, and with new evidence, even words will adapt. What was gravity yesterday is graviton today.