Text: If Birdwhistell, in his travels, had been looking not for smiles but for smirks , Chatterbox strongly suspects he would have found lots of them on the smile-barren East Coast, especially in the vicinity of its prep schools and Ivy League universities . Here's a thought  Summon up a mental image of Ali McGraw, the smirkiest performer in the history of the movies.
Entailment: There would have been people smirking at Bidwhistell in the East Coast.
Contradiction: In the East Coast Birdwhistell would have been received with no shortage of smiles.