" There isn't one relationship , x and another; x and a - x and b - and x and c."



    That should have read,


    " There isn't one relationship , x and another.

There are three, namely:- x and a - x and b - and x and c."




   and one Ivor (aren't there? [in a funny voice] Ys)

   PS Didn't get on with The Matrix - some people shot and they die; others shot the same way and they didn't.Hunh? :-)