Anchor: It is impossible for him to be present in person." He stopped, giving a curious impression of having left the sentence unfinished.
Entailed: He can't be present in person.
Contradiction: He can be present in person.
Contradiction: People are petting a kitten.
Contradiction: There was no tone in his voice.
Contradiction: Gershom Scholem knew Hannah Allen.
Contradiction: A little boy was playing with his legos by the Christmas tree.