is there a way to grade art ?

Yes they are useless. But this is a good and beautiful thing about art. Example: last year I was cleaning out my entertainment console and found a bunch of videocassettes I never watched anymore. So since I was bored and sort of wired I smashed them all up and then glued and taped them into a big crunchy ball and put the whole thing on top of my TV tray. I wheeled this over to some skinny bohemian bitch's apartment I mean FLAT and told her "this is my new piece". Then she agreed to lick my balls and finger my ass. This is why I HEART ART.

Short answer: no.

Long answer: no no no no no no no.

well the art department at the college I went to just gives everyone A's as long as they show up most of the time.

Subjectivity implies that an individual's judgement of quality is not transferable, not that an individual has no means of making such a judgement. It doesn't assume all art is 'equal', it doesn't assume that all judgements are 'equal' even - it assumes that there is no objective standard behind artistic judgements, so you are free to choose which judgements (your own or anyone else's) you trust.

In other words, if all six billion people on this earth agreed that Bach was better than Britney it would not make Bach objectively better than Britney, any more than it would prove the existence of God if all six billion people believed in him.

1: take a painting
2: convert it colour-by-numbers schematiXoR
3: add up numbers
4: highest score = BEST PAINTING!!

I do not see how this can faulted.

Works for me. If all the art is graded by the same person there is at least some claims at subjective consistency. Of course that won't help if the person grading just plain doesn't like your work (look at Ghost World for a perfect example of this).

I thought that all art was quite useless anyway. that's what someone reminded me last night.

ARR OI PEE!