Premise: The Carre Rive Gauche, bounded by the quai Voltaire, the boulevard St-Germain, and the rues du Bac and des Sts-Pares, is something of a museum of ancient Egyptian, Chinese, pre-Columbian, African, and Polynesian art, as well as Louis XV, Second Empire, Art Nouveau, and Art Deco.

Hypothesis: None of Art Deco's art has been seen in person, meaning everyone is simply guessing how it'd look.
Relation: contradiction