ethos, pathos, logos for the new paper...

My new paper is going to include ethos, pathos, and logos throughout the whole paper.  Its easy to use pathos because most controversial words or topics have an emotional appeal.  For those who say art has to be "beautiful" or produce something "aesthetic", an emotionally moving piece of art work would definately back up their argument, but i know of countless works of art that aren't "beautiful" but are art nonetheless.  Ethically its kinda hard to prove my definition of art seeing how no ones given the word a universal definition.  But, i can still prove i know what im talking about by showing how much ive researched and read on the word.  Logos will be difficult as well because the word art relies alot on personal opinion especially when defining the word with so many different forms of art.  It'll be interesting to see how i relate art to the three 'os.