[EM] Matthijs van Duin criterion

[Jobst Heitzig]

Dear Warren,

you wrote:
> --are there any pure rank-order methods that obey this criterion?
E.g., every method which picks from the Copeland set will do, for 
example: MMPO inside the Copeland set.

Perhaps we also find a pure rank-order and clone-proof method?

However, so far I'm happy that DMC is again fulfilling naturally a new 
criterion, while other methods seem to have problems with it.

Yours, Jobst