I took the quiz at the beginning and got three wrong, every one of them could have been toddler art or modern art. I think art is in the eye of the artist and also the beholder. If someone expresses themselves they are valid in calling it art but those looking at it may disagree and I think that's fair too because we all have our own perceptions. Some art in itself has nothing aesthetic or beautiful but the concept is more important which definitely makes defining it a slippery thing.