Charles wrote: > How about M1 + M2+ M3+M4 ?
If M3 and M4 are defined, then M4 nests M3, which nests M2, which nests M1. If you add them up like that, then you are quadruple counting M1, triple counting the non-M1 parts of M2, and double counting the non-M2 parts of M3. _______________________________________________ pen-l mailing list [email protected] https://lists.csuchico.edu/mailman/listinfo/pen-l
