... survived.¹

Milan Zeleny, personal communication, 1994.

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... paper.²

A comprehensive account, including the original critique, copies of the rediscovered contemporary documents and source code, and the discrepancy analysis, has been made available through the Working Papers series of the Santa Fe Institute [27]. A more informal account of the unravelling of this puzzle is also available [26].

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... selection.³

It may be noted that there is an interesting ``boot-strapping'' problem here. Darwinian evolution requires fairly well defined individuals; but the development of suitable individuation mechanisms may need an extended evolutionary process. The resolution of this is likely to involve incremental and mutually reinforcing improvements in individuation and ``evolvability''. An excellent discussion of the evolution of individuality in conventional biology is provided by Buss [2].

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