??what about the idea that "stuff is structures"?? ...or something... ??...

consider a g-torsor equipped with some structure under the cartan limit... at most a pair of flags...

then consider forgetting some of the structure and some of the stuff... ??though maybe with another "cartan limit" here?? ??don't forget more than a certain amount of stuff ... ??...

(??vs don't remember more than a certain amoount of structure?? or something??)

??this as corresponding to "subquotient" ?? quotient algebra of subalgebra....

??lattice of such subquotients?? combinatorial description of it??

??relationships among a2,b2,g2,...?? here... ???....

??might also be interesting to look at subquotient lattice of finite group...

g <-< s ->> q

??...