Thus, the digraph for bis-(2-hydroxyphenyl)methanol is shown in Figure , where numbers are distances to the root assigned for each node needed for Rule 1b (not the usual atomic numbers seen on digraphs in BB 2013). The specific representation of the bonding is no longer significant, and the center is found to have no descriptor, as expected. There is an additional aspect of Rule 1b we suggest revising. The original statement of Rule 1b includes an additional criterion ranking any duplicate node higher than any node that is not a duplicate node for these purposes. The consensus of our group was to recommend changing the language of Rule 2 to be specific, using exact isotopic mass when an isotope is indicated, and atomic weight when it is not.