[r6rs-discuss] Case sensitivity

[Brian Harvey]

John Cowan <cowan at ccil.org> says:
>         a three-level scheme for sorting (sort first by letter identity,
>         then by diacritic marks, then by case, roughly)

Okay, wait, now I'm really confused.  If we already have a notion of
"letter identity" that works for sorting and is already customized for
all those languages, why isn't it good enough for case-folding too?