Anchor: It's anybody's guess whether unmeasured productivity growth in the last few years is greater or less than in the past.
Entailed: No one knows if unmeasured productivity is different from how it was in the past.
Contradiction: We now know exactly how much unmeasured productivity there is.
Contradiction: A young bird is in its nest.
Contradiction: I was unlikely to forget his name as it was not common.  
Contradiction: A woman standing up talking to a crowd.
Contradiction: there is a small dog