Bunuel
In recent years, some painters of graffiti have been winning recognition as artists. But since graffiti is vandalism, painting graffiti is inherently an act of rebellion and lawbreaking. For this reason, painting graffiti is not art.
Which of the following is an assumption that supports drawing the conclusion above from the reason given for that conclusion?
A. Some graffiti is painted in remote places, where it will not be used by any law enforcer or anyone else.
B. Some painters of graffiti are more concerned than others with the illegal nature of the paintings they produce.
C. Painters of graffiti should be more concerned with the illegality of their paintings than they currently are.
D. An object is not an art object if its maker might be motivated primarily by questions of whether or not creating that object is permissible.
E. Artists are not concerned with the monetary value of their products.
An assumption is just that - what the author assumes (but doesn't mention) for the sake of his/her argument. It is what he/she assumes is true. An assumption is a missing necessary premise.
We need the assumption from the options. Hence we need what must be true.
A technique to figure out the assumption is assumption negation technique (ANT). Negate the option and see if the conclusion falls apart. If it does, that means the option is necessary for the conclusion to hold and hence is the assumption. Though useful sometimes, I am not a huge fan of ANT. Sometimes, it complicates matters unnecessarily.
Some painters of graffiti have been winning recognition as artists.
But graffiti is vandalism, an act of rebellion and lawbreaking.
Conclusion: Painting graffiti is not art
The argument says that because graffiti is act of rebellion, it is not art.
What is the assumption? The argument assumes that if an act is an act of rebellion, it is not art.
That is pretty much what option (D) says. Option (D) is the assumption here.
If you negate (D), you get
D. An object is an art object if its maker might be motivated primarily by questions of whether or not creating that object is permissible.
This says that if an act is an act of rebellion, it is art.
In that case, our conclusion cannot hold that painting graffiti is not art. Since it is an act of rebellion, it must be art.
Answer must be (D).