Anchor: You can make an argument that intelligence is an extremely unlikely, random, quirky event in terrestrial biology, or you can make the counter-argument that you can see intelligence coming down the pike from many millions of years in advance.
Entailed: You could reasonably say that intelligence is very unlikely to be developed.
Contradiction: Intelligence is a very deterministic trait, that is able to be predicted accurately.
Contradiction: I am going to stay out of trouble.
Contradiction: A man and woman lay in the grass together.
Contradiction: Two people are swimming in a body of water.
Contradiction: It's happening everywhere.