Anchor: Except that unique animals might have landed during the night.  
Entailed: During the night some unique animals may have made a landing.
Contradiction: During the night several ordinary animals may have possibly landed.
Contradiction: the birds were short necked
Contradiction: The wig on my head does not feel light. 
Contradiction: I wasn't going to need to get new tires again.
Contradiction: Since the new cohort studies have information about individual health status and residence, they're much better.