Some twentieth-century art is great art. All great art involves original ideas, and any art that is not influential ...

Mehran March 22, 2018

The correct answer choice is (C). Please let us know if you have any additional questions.

Tony October 10, 2018

Hi, could you also explain why A isnt correct?

Mehran October 12, 2018

@melissakaijukags of course! Let's break it down.

"Some twentieth-century are is great art."

20thA-some-GA

"All great art involves original ideas . . . "

GA ==> OI
not OI ==> not GA

" . . . any art that is not influential cannot be great art."

Not I ==> not GA
GA ==> I

This is a Bizarro Must Be True question, so the four incorrect answer choices must be true, while the correct answer choice is not necessarily true.

(A) follows logically from the following:

GA ==> I
GA ==> OI

Remember, we can convert an S & N statement into a some statement (assuming the existence of the sufficient condition).

So we can convert either one of these S & N statements into a some statement as follows:

I-some-GA

We can then combine with the other S & N statement as follows:

I-some-GA ==> OI

To conclude:

I-some-OI (i.e. "Some influential art involves original ideas.")

So (A) must be true and (A) would be eliminated.

Hope that helps! Please let us know if you have any other questions.