Anchor: Since you are so kind, let us go and have some breakfast." Every one was assembled in the dining-room. 
Entailed: Everyone had gathered in the dining room. 
Contradiction: Everyone had gathered in the bathroom for dinner. 
Contradiction: A factor of pi was not missing.
Contradiction: The dogs are running.
Contradiction: People have inline skates because they love Tonya Harding.
Contradiction: Exactly as I expected.