Evolution

1. A process of unfolding or continuous change from a lower, simpler, or worse state to a higher, more complex, or better state. This may be regarded in two senses: as the unfolding of that which is enfolded, namely the rendering explicit of that which is hitherto implicit (which may be termed development); and the outspringing of something that has hitherto not been in being (which may be termed emergence).

2. A process whereby some degree of randomness modifies the logic of behaviour thus producing a mutation which is then tested for survival value against the embedding environment. Those logics which survive are in turn affected by randomness, and thus mutated and themselves tested for survival, resulting either in an extinction or some modified logic that fits an ecological niche. In a dynamic environment some continual modification of the logic is required for survival of the species, although excessive randomness can also result in extinction.