Najis

According to Shi'a Islam, there are two kinds of najis: the essential najis which cannot be cleaned and the unessential najis which become najis while in contact with another najis.
I came across this funny sentence while browsing Wikipedia for information about Hudud.


Which type of najis is it, eh?


Is it an essential najis? It obviously cannot be cleaned. But it isn't essential...to anything...


But does it only become najis when in contact with another najis?
Or does it make najis out of nothing?
Maybe it is the najis penultimate...


DISCLAIMER:
THIS PICTURE WAS NOT PLACED HERE BY ME.
IT WAS THE ALIENS.