Anchor: As far as we know, she was quite alone during that halfhour. 
Entailed: There is no evidence that she was with anyone.
Contradiction: We know that she was with some people during that time.
Contradiction: We have run out of time.
Contradiction: A person in a swimsuit gets wet.
Contradiction: they are in the military
Contradiction: There are bipedal hominids moving by a body of water.