Anchor: If Thorn or the Kal should fall or become pressed, Jon would know.
Entailed: Jon would be aware of the Kal or Thorn falling. There's no doubt about it.
Contradiction: Jon would never know if the Kal or Thorn died. There's no reason for him to know, anyway. 
Contradiction: A person is looking at a sculpture and another is jogging.
Contradiction: Berman's comment points out that Congress must have known about the presence requirement.
Contradiction: a woman jumps for joy
Contradiction: Arrow says there should be no flip-flops.