T-Rex: How do we know if a given work of art is great?

T-Rex: I don't want to waste my time on art that sucks!!

Dromiceiomimus: You could see if other people like it!
T-Rex: But that's just popularity! And being popular isn't the same as being great. High school and the weekly top 40 countdown taught me that!
T-Rex and Dromiceiomimus: ZING

Utahraptor: You could see what the critics say!
T-Rex: True, but they don't all agree with each other!

Utahraptor: Then take the critical consensus!
T-Rex: That's just popularity with a different clique! Isn't there some OBJECTIVE measure of greatness?
Utahraptor: ...If it passes the test of time?

T-Rex: That's just popularity over a longer time range! And NOTHING'S popular forever, so on a long enough timeline, everybody sucks!!
T-Rex: Oh noooo!
T-Rex: I'M TRAPPED ON A PLANET OF EVENTUALLY SUCKY DUDS