Not all works of art represent something, but some do, and their doing so is relevant to our aesthetic experience of them; representation is therefore an aesthetically relevant property.
Conclusion (so)
There can't be any clear criteria for determining whether an object qualifies as art.
Evidence
Some works of art are representational, and what they represent is an aesthetically relevant property of the art. But whether art possesses this property or not depends upon context, and there aren't any clear cut rules for determining if an object does / doesn't have a context-dependent property.
Evaluate
They were just trying to punish us there. Brutal read. Let's focus on the connection between the final idea and the conclusion:
If ... Then ... no clear criteria no clear criteria for determining → for determining context-dependent whether object properties is art ... ?
That must be assuming that .
We could weaken the argument by attacking that assumption, saying something like, .
We could also object to our author thinking that, .
Who said we need clear cut criteria in order to figure out context-dependent properties? I'm pretty sure the Supreme Court famously failed to provide any clear cut criteria for the "it depends" property of obscenity, deeming that "you know it when you see it". They were confident that even if you don't rigorously define it, you may be able to clearly identify sometimes.
Goal
Look for an answer showing how we could determine whether an object qualifies as art, even though we don't have clear cut criteria for determining context-dependent properties. -- maybe we don't need context-dependent to ascertain whether it's art -- maybe we don't need clear cut criteria to ascertain whether context-dependent stuff is present