Anchor: It would be folly for a visitor to expect American-style efficiency or speedy service; it would be wisest to slip into the casual drift of things West Indian.
Entailed: It would be a mistake for a visitor to expect American-style efficiency or speedy service.
Contradiction: It would be perfectly fine to assume a visitor will receive the same type of American-style efficiency. 
Contradiction: People are not at an event
Contradiction: We thank the LSC Board of Directors.
Contradiction: I looked at Ben. 
Contradiction: A surfer rides a wave.