Re: tutorial question

[CJ FINE <cbmvax!uunet!BRADFORD.AC.UK!pucc.PRINCETON.EDU!C.J.Fine>]

>
>
> In
>
>    Diagrammed Summary of Lojban Grammar Forms with Example Sentences
>
> the following appears:
>
>      "po'u" identifies a sumti by giving another IDENTITY in the form of
>      another sumti that could equivalently replace the original:
>
>           la djan. po'u le ctuca [ku] [ge'u] [cu] klama [vau]
>           -------- <    -------------    |        =====
>           John, the teacher, comes.
>
> It appears to me that the cu in front of klama is not optional.
> Or do I not understand what [ ] means?
>
>         Frank Schulz ( fschulz@pyramid.com )
>

At least one of the three optional cmavo is required, but any of them
will do, so in a sense 'cu' is optional. However, the textbook suggests
that given a choice of which to keep, you keep 'cu', which seems a good
idea to me.
                Kolin