Anchor: Let us assume that our 1900 and 1990 12-year-olds are identical twins magically born 90 years apart.
Entailed: There are 12 year old twins who are identical but not born in the same year.
Contradiction: These identical twins were born 90 seconds apart.
Contradiction: The crew was unable to fix the problem.
Contradiction: The electricity generators would not be told how to reduce emissions by the government.
Contradiction: Gradually, she fell into a slumber.
Contradiction: The salamander stopped its purring for a little while, but then began again after.