Evolutionary algorithms make use of randomness, but evolutionary solutions are neither random, nor irrational. Non-deterministic, yes. Unpredictable, sure. Cha

Evolutionary algorithms make use of randomness, but evolutionary solutions are neither random, nor irrational. Non-deterministic, yes. Unpredictable, sure. Chaotic... you betcha. Random... certainly not. And not irrational - the process is driven to optimize for survival, and selections occur accordingly. It meets the economic and game theory definitions for rational behaviour. The rationality is not driven by a sentient intelligence, but the result could arguably be called a limited form of intelligence, and we know it can certainly give rise to expressions of intelligent systems.