Anchor: Perhaps The Treasure of the Sierra Madre was showing in Cambridge that weekend and each economist realized that he would always have to worry about the other two guys.
Entailed: An event of spectacular proportions caused economists to realize that they always would have to worry about the other men. 
Contradiction: The economists that weekend were not worried at all and remained in a state of bliss. 
Contradiction: A bird lives in the backpack.
Contradiction: A couple is next to a body of water.
Contradiction: They didn't have to change for the entire trip.
Contradiction: I took a trip across the Mohave Desert when I went to Las Vegas.