Does '  There's nothing like the trendy resort clothing available here, styled on the island by the designers of the Ad-Lib group.' logically negate the premise 'There is no trendy resort clothing available here, so you would have to go elsewhere to find it.'
  There's nothing like the trendy resort clothing available here, styled on the island by the designers of the Ad-Lib group.###There is no trendy resort clothing available here, so you would have to go elsewhere to find it.