Anchor: Yes, surely it must be so, unless ” ” A new idea suggested itself to my mind. 
Entailed: The intriguing new idea came to Poirot in the midst of explaining his current theory. 
Contradiction: Poirot was stumped, having had no new ideas in recent days.
Contradiction: The towpath walk is rather unpleasant, going past landfills and swamps.
Contradiction: There are two people in the check out line
Contradiction: the man is at home sleeping
Contradiction: We are going to see the statue of David, the Sistine Chapel and the dome of St. Peter's in Rome and expect to be awed.