This is a follow-up question:
“una domus erat, idem victus, isque communis” (103)
Does “is” refer to “victus”? If so, it seems that “is communis [erat nobis]” and “idem victus [erat nobis]” have exactly the same meaning.
please note that in “una domus erat, idem victus, isque communis” (Cicero, De Amicitia, 103) the pronoun “is” refers to “victus” (diet/food), just to emphasize that Laelius and Scipio ate the same food (idem victus) at the same table (isque communis), so that they were always together.
Therefore “is communis [erat nobis]” and “idem victus [erat nobis]” do not have exactly the same meaning, for Laelius wants to point out that he himself and Scipio did not eat in different rooms, but in the same room at the same table.
Hence:” “We had only one home, the same diet that we shared in common”.
Hope this is clear enough.