A travel writer spent three days in a hill town. She ate at the two restaurants standing nearest the bus stand, found the food at both disappointing, and wrote in her column that the town has nothing worth eating. Her reasoning is most open to the objection that:

Restaurants clustered around a bus stand cater largely to travellers passing through and are among the least likely places in any town to stand for its cooking as a whole. A conclusion about every eating place in the town needs evidence drawn from across the town, not from two places picked by convenience. Prices, names and the owners' opinions have no bearing on whether her sample supports her verdict.