[lojban-beginners] A question about se

[Zachary <vyseofarcadia17@gmail.com>]

I was just reading the section in Lojban for Beginners on conversion  
and the use of se. What puzzles me is not se itself, but the fact  
that both cu and se are placed before the selbri sometimes, but not  
always. For example

le nu mi klama cu se tcika la daucac.

Wouldn't the use of se in front of the selbri signify that it is the  
selbri, thus making cu useless? Or is se one of those cmavo that can  
be placed anywhere in a bridi, thus making cu necessary?

- ZAkyris