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Beginning with "Self-Reproducing Automate" by John Von Neumann:
The combination of a universal constructor and a universal computer can self-reproduce.
A person is a nontrivial quasi-universal constructor and also a nontrivial quasi-universal computer.
A machine tool is a nontrivial quasi-universal constructor.
A solo inventor will never implement a nontrivial self-reproducing machine tool.
A team of inventors has the best chance of implementing a self-reproducing machine tool.
No single machine tool will ever make its own parts; a suite is required.
A team of inventor/operators has the best chance of implementing a self-reproducing machine tool suite.
A team so configured plus a mathematician/documentarian is a minimal team for implementing a self-reproducing machine tool suite.
Each machine in such a self-reproducing machine tool suite can be described by a descriptor struct starting with a machine list.
Each machine in such a self-reproducing machine tool suite can be denoted by an index variable, _i_
Each part of each machine in such a self-reproducing machine tool suite can be described by a feature list, indexed by an index variable, _j_.
Each feature of each part of each machine in such a self-reproducing machine tool suite can be described by an assignment of the feature to a machine in the suite, denoted by an index variable _k_.
Each feature of each part of each machine in such a self-reproducing machine tool suite can be described by a G&M code numerical control instruction list using G&M coding for the machine in the suite which can make the feature indexed by a code line number, _l_.
Such a self-reproducing machine tool suite would have _n_ machines, indexed by _i_, with 1<=i<=imax, with _n_sub_i_sub_p_ parts in each machine, creating a need for a new notation of sub subscripts.
We may assign the value of imax to n_sub_0.
Such a self-reproducing machine tool suite would have 1<=j<=pmax_sub_i parts per machine.
We may assign the value of pmax to n_sub_i_sub_0.
Such a self-reproducing machine tool suite would have 1<=kmax_sub_n_sub_i_sub_j<=f features in a feature list describing it.
The resulting struct is anything but tidy.
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