premise: Versailles is situated 24 km (15 miles) southwest of Paris, by road (N10); or by train from Gare St-Lazare to Versailles; or by RER (line C5) to Versailles-Rive Gauche; or by metro to Pont de Savres, then bus 171.
hypothesis: The cheapest method of getting to Versailles, from Paris, is via road.