Our discussion revolved around how to address this issue algorithmically: (a) Should we implement an averaging scheme as in Rule 1a for all six duplicate nodes? (b) Do we omit multiplebond duplicate nodes from consideration--just assigning them "n/a" and skipping them entirely? (c) Should we assign the distance to the root of their sphere? (d) Do we assign the distance to the root of their attached atom? Our group decided that the first of these options was too complex, the second would lead to ambiguities in the algorithm, the third would not work, and the simplest and surest solution would be the last of these --to assign to a multiple-bond duplicate node the distance to the root of its corresponding attached atom, not its corresponding duplicated atom.