[lojban-beginners] Re: logical proofs?

["Chris Howlett" <chris@balcomie.freeserve.co.uk>]

> 
> The rest of you should note that this isn't even *close* to 
> begginer Lojban.
>

I concur - although the maths is quite fun (I'm a maths grad). But I do
have one lojban query:

What does broda do, and how does it work? My wordlist gives it as
"predicate var 1: 1st assignable variable predicate (context determines
place structure)", which makes it sound like a pro-bridi. So why not
just use the bridi itself?

Curiously,

Chris.