The current presentation reflects the structure of the rank conjunction.
Basically, any presentation can be mis-interpreted, and requires a
certain amount of effort to appreciate.
Also, keep in mind that the dictionary entry for |. covers not only
Rotate, but Reverse.
Also, keep in mind that the
I imagine that this topic is of low priority to practically every J
programmer who has a mastery of the language and because they are so used
to the present notation of rank in, say, NuVoc.
For example, why is the brief definition of >. displayed as
Larger of
0 Ceiling •