What Cellular Automata Teach — Simple Rules and a Computational Universe
We began with a grid of cells flipping on and off by a trivial rule. We end with a radical idea: that the universe itself might be, at bottom, a vast computation running simple rules. This final post steps back to ask what cellular automata ultimately teach us — about complexity, computation, prediction, and the nature of reality — and why a toy of blinking cells turns out to carry some of the deepest ideas in science.
The big lessons: complexity needs no complex cause (emergence), computation is cheap and pervasive (Turing completeness) yet prediction has fundamental limits (irreducibility, undecidability), life's hallmarks emerge from rules, and — the boldest idea — the universe itself might be a vast computation running simple rules.