Kvartet I about modern art

I've been to New-York, Solomon R Guggenheim Museum, on the fifth floor they had contemporary art exhibition.
Firts thing thing i saw there was a painting with some kind of yellow parallelepiped on it. On description it said yellow parallelepiped.
I thought to myself: "Well, actually 100 years ago Malevich drew something like that already. This theme has been done."
Next exibit was some rubbish surrounded by a rope and signed: "pile of junk."
After this i was able to guess names of exibits easily.
Further on i saw a WC with excactly same rope and signature: "Toilet out of order".
I got confused: "Either this is a real toilet and it is broken or is it a piece of art by the name "Toilet out of order"?"
So did you find out which one is it?
I didnt see the point in guessing either i'll take a piss into a broken toilet and then i'll have problems with the museum's security or ill take a whizz into a peice of art, i might as well piss in this artitst's soul.
So i moved on to look for a piece of art by the name "Lavatory is in order".

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