Anchor: That leaves us two possibilities: either he knew what was going to happen or he had a reason of his own for his absence." 68 "And that reason?" I asked sceptically. 
Entailed: That leaves two possibilities; he knew what would happen, or his absence was intentional.
Contradiction: That leaves us with plenty of possibilities to think about.
Contradiction: A lady is spray painting a wall.
Contradiction: There is a group of cyclists
Contradiction: I am the one that insists on getting a Toyota pickup truck.
Contradiction: Have you thought of building a house?