Anchor: You've been entertaining a celebrity unawares, I replied. 
Entailed: You've been unknowingly taking care of a celebrity. 
Contradiction: It was well-known I was a celebrity. 
Contradiction: In a postal monopoly observers notice delivery functions do not exhibit economies of scale.
Contradiction: It was secured from the inside.
Contradiction: Julius was not going to do anything to Mr Brown
Contradiction: They are out there still.