Premise: In the old town center ' which is closed to traffic ' keep an eye open for the many handsome gabled houses of the Renaissance the Ancienne Douane (Old Customs House, Grand-Rue); Maison des Arcades (Grand-Rue); Maison Pfister (Rue des Marchands); and Maison des Tates (Rue des Tates).

Hypothesis: The Old Town does not contain any gabled houses. 
Relation: contradiction