Anyone who believes in democracy has a high regard for the wisdom of the masses.
Conclusion (thus)
Griley does not believe in democracy.
Premise
Anyone who believes in democracy has a high regard for the wisdom of the masses.
Griley is an elitist who believes that any popular artwork is unlikely to be good.
Evaluate
We're trying to prove that someone "doesn't believe in democracy", and the evidence did provide a way to prove that.
don't have high regard → don't believe in for wisdom of masses democracy
When the evidence provides a rule that proves the Telling Part of our conclusion, then our whole job becomes proving the trigger of that rule.
We need to prove that Griley doesn't have high regard for wisdom of the masses.
Goal
We have to get from something we know about Griley (he's an elitist / he thinks popular art is unlikely to be good) to what we need to know about him, that he doesn't have high a high regard for the wisdom of the masses.