Anchor: There was evidence that life was present just as soon as the planet cooled and solidified.
Entailed: Evidence points to life being present as soon at the planet cooled. 
Contradiction: There was no proof that life had ever existed, because the planet had frozen over millions of years ago.
Contradiction: Although the planet had cooled and solidified, there was no evidence of any life present.
Contradiction: There was no evidence for life at all on the planet. 
Contradiction: the barefoot boy sits on the couch
Contradiction: They know best that it can be hard to do the former.