I didn't get that far along, laying out criteria comes after the initial idea stage. It'd be measuring the amount of pathos you have for a certain situation, then you click on a swingometer of pathos, judging the image according to how sad you found it.
I seem to recall something about a new presence of a certain type of droppings, or wait - was it something about bourgeoisie... no, I think actually it was cow patties.