Reading this result: Rule 30 is chaotic: from a single seed it produces patterns random enough that Wolfram used its center column as a random-number generator.
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Cellular automata update each cell from its neighbors by a fixed rule. Elementary automata (256 rules) range from trivial to chaotic (Rule 30) to Turing-complete (Rule 110); Conway's Game of Life produces gliders and self-replicating structures from just four rules — landmark examples of emergent complexity.
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