> From: And Rosta -850 <ucleaar@uk.ac.ucl> > If > se gives x2 x1 x3 > te gives x3 x2 x1 > then is it the case that > se te gives x2 x3 x1 > te se gives x3 x1 x2 > and > te se te and se te se both give x1 x3 x2 > ? satcydrati .i'e (exactly so) Colin