Anchor: This great civilization came to a sudden, catastrophic end around 1450 b.c.
Entailed: This grand civilization suddenly ended tragically around 1450 b.c.
Contradiction: The civilization came to an end in 1900 b.c. 
Contradiction: The writers didn't even attempt to write in terms that the people of the time could understand.
Contradiction: Girls are dancing.
Contradiction: Yes, I have seen that before.
Contradiction: Those groups will end your life.