Anchor: seams that need to be really strong need to be done on the sewing machine
Entailed: Seams that need to be strong need to be done on the sewing machine.
Contradiction: Sewing machines make weaker seams.
Contradiction: A cow eating hay.
Contradiction: Are your cucumbers good?
Contradiction: The teenager is driving a car through the forest.
Contradiction: A man is adjusting a bicycle.