?? talking to john huerta about bn-pairs and buildings and so forth ... ?? non-/anomalousness of "q=1" case .... ??? "coxeter-valued metric on flags" approach seems to work fine (?? better ?? ...) in q=1 case ... ?? "apartment-chamber geometry" approach, though ?? ... ??? to what extent did we (?? ...) actually work out such an approach ?? ... ?? simple classical-valued incidence relation ??? ... ?? possibility of coxeter diagram being somehow automatically encoded in such relation ?? .... ?? not sure such approach works at all, but ... ?? even if it does, q=1 case seems somewhat (?? ...) problematic .... ??? ...